Showing posts with label inquiry based learning. Show all posts
Showing posts with label inquiry based learning. Show all posts

Monday, November 14, 2011

“How long does it take to eat a Freezie?” -- A Math Inquiry: Blog #42






 Since being pumped up from the Science Teachers Association of Ontario’s (STAO) conference last week, where I was awarded the Secondary Schools Science Teacher of the Year 2011 by Youth Science Canada, I decided to do an inquiry based lesson with my math class today.

Some people may have hesitated before trying inquiry based learning with my math class for any number of reasons:
  • Class room dynamics are unpredictable
  • Each learner is on their own individualized learning plan (IEP)
  • A wide range of mathematical ability
  •  50% of the students are English Language Learners (ELL)
  •  I’ve been out of the classroom for the past 3 teaching days
  • This is a split level math class with KNN9A, MAT1L  and MAT2L students present

No worries! I am confident this will work! The inquiry we conducted was: “How long does it take to eat a Freezie?” For those of you unfamiliar with freezies they are basically frozen sugar water sealed inside a flexible plastic cylinder. Kids cut the top off the plastic, push up the frozen treat and enjoy them – especially in hot weather.
Together we brainstormed all the possible variables that needed to be taken into consideration prior to conducting our test. Here is the list that the students generated:
  • Temperature -- Frozen or liquid
  • How hungry are you?
  • Eating techniques
  • What size is the Freezie?
  • Colour – it was determined via discussion that the students eat their favourite colour faster than others
  • How many do you have? Class discussion revealed that if there was only one freezie a person would be more apt to take their time and enjoy it whereas they would gobble it up quickly if there were lots more available to them
  • Would you be just eating, or eating while talking?

Since I was the holder of the freezies I was able to inform the students that the freezies were currently: 
  •  Frozen
  • Large
  • Various colours
  • They would each get one
  • They would just eat and not talk
Next the students each thought about long it takes them to eat a Freezie and recorded their estimate.
Students were then instructed to pull out whatever technology they had in their pocket and find the timer or stop-watch feature on it. This integration of 21st century technology lead to several teachable moments while the students were amazed that they even  had this capacity on their gadgets, downloaded appropriate apps from the internet and helped each other with this task. Those who had no technology moved to sit with those who did without me guiding them whatsoever.  The collaboration between the students was natural and free flowing! 
Students cut the tops off their freezies, started their timers and sat back to enjoy their investigation. As each student completed their eating task they recorded their time.
By the time all the data was collected and tabulated today’s class was over. Tomorrow we shall move on to analysis. The type of information the students will be expected to extract from the data will depend on what level they are working at. The types of questions that shall be posed range from: “Who ate their Freezie the fastest” to “calculate the mode of the time it took for the freezies to be eaten in our class.”
Because the students are working with data they generated themselves they have ownership of it. This makes the learning task engaging and authentic to them. Learning is fun!

Monday, October 31, 2011

Demonstrating a Chemical Reaction -- Post #42

My grade nine applied science class is currently studying a unit on chemistry.  We have learned the types of evidence for a chemical reaction occurring (colour change, bubble, heat / light, formation of precipitate).
In this demonstration of “elephant tooth paste” we are looking for evidence that it is a chemical reaction. In the first video you will note that the reaction is not impressive. In the second video the reaction is more impressive and the students are more engaged.


Listen to the questions that are being generated by the students!

Allowing the students to record the reaction with their own electronic devices allows them to replay the activity over for friends and family, each time they watch it their learning is reinforced!
To make elephant toothpaste:
(CAUTION! CORROSIVE!)
1.       Put 50 mL H2O2 into a 1000 mL graduated cylinder Add about 20 ml liquid soap
2.       Swirl
3.       Add a few drops of food colouring (optional)
4.       Add about 10 mL KI (catalyst)
5.       Stand back!
Which one of the student generated questions or comments impressed you the most? Leave your reply in the comment box below!

Sunday, October 2, 2011

Comparing Compostable (Starch based) Plastic to Tradition (Petroleum Based) Plastic: An Inquiry – Blog #41


Petroleum-based plastic (top) and Starch-based plastic (bottom) reaction with 5 drips of acid, for 5 minutes.
This week my grade nine applied science designed and performed an inquiry into the difference between compostable and petroleum-based plastic. This idea came to me while shopping at our local “dollar store” where I espied some packages of “compostable plastic bags”. These bags are specifically banned from our municipal composting program and I started to wonder if they really do break down and if so under what conditions. We are currently studying ecology in class so I bought a package of the compostable bags and took them into school. 

Strength test
When I showed the package to the students I had to take a step back because most of them did not know the word or the concept of composting.  So we spent an entire period learning about “compostable” and “ biogradable”. Those who did have prior knowledge shared what they knew, then YouTube and I filled in the blanks.
Now that the students understood that bags that are labeled as “compostable” are expected to break down in nature, I passed out a small piece (about 5 cm x 5 cm) of the two types of plastic to each of them. I encouraged them to feel the plastics and discuss with a partner various properties that could be compared between the two plastics. The students came up with an amazing list of nine properties! The properties they thought could be compared were:
1.      Colour
2.      Texture
3.      Odour
4.      Density
5.      Strength
6.      Stretchability (plasticity)
7.      Reaction in acid
8.      Reaction in water
9.      Flammability
This list of nine properties was the independent variables that we would study during our investigation.
Checking odour by wafting.

Prior to getting into the details of how to test for these properties the class brainstormed what variables would have to be controlled in order for the tests to be fair. They decided the controlled variables should be:
1.      Size of plastic sample
2.      Volume of water (where applicable)
3.      Volume of acid (where applicable)
4.      Temperature of the liquids used
5.      Time (where applicable)

Students were then instructed to work with a partner. Each pair of students was given one of the independent variables to consider. Together the pair of students designed a simple method for testing for their assigned property. They jotted down their design plans and submitted them to me. These pieces of paper became the procedure for the comparison tests. I told the students I would consolidate the procedures that they had designed for each of the nine properties into one list for them to use when performing the inquiry.

Prior to class the next day, I did prepare a table wherein the procedure for each test was listed together with space for the students to record their observations. I also assembled all the apparatus and materials the students could possibly require to complete the lab and placed them in a central location.
The students’ findings to date are that there was very little difference between these two types of plastics, when tested as described above. There remain two steps of my challenge to them:
1.      Tomorrow I will give them the opportunity to design and implement any further tests they wish to use to compare the plastics, ie. boil in acid, boil in water, subject to freezing, etc. It will be up to the students to come up with any test ideas and implement them.
The expression on this studnt's face is typical during a student designed inquiry!

2.      The next day they will have a choice of two activities; either write a letter to one of the plastic manufacturers describing their tests and the results or perform internet research to determine what other tests could have been performed that would have produced significantly different results for the two types of plastics. (ie. microbial activity, extended time, high temperatures)

Due to the high number of English Second Language (ESL) students in my class I am going to give the students the option of working either alone or to pair up in partners of English speakers with ESL students. This written product will be the final evaluation piece for this inquiry.
I would love to hear your ideas for other tests we could do on these two types of plastics, considering the restraints of a typical high school science lab. Please leave your comments and suggestions in the box below.


Friday, September 2, 2011

The Evolution of a 21st Century Educator -- post #37

Anyone that is involved in education has heard the phrases “21st century education” and “21st century learners” ad infinitum. I don’t know their origin but these words, and more importantly, their meanings slowly crept up on us during the last decade or so.
There are a wide variety of educational, and other, resources which attempt to define and expand on what 21st century education is, or should be. One of the most succinct and comprehensive is Learning for the 21st Century: A Report and Mile Guide for 21st Century Skills , an American publication from the Partnership for 21st Century Skills.              
It is outside of my purpose for writing this blog post to argue for definitions around any of the “21st century . . . “terms. If you are unsure of what I am referring to by these terms, this publication is a good overview of what I understand them to be and I am using this as my standard reference.
This summer I started purging all the paper I have accumulated over my ongoing career as an educator. This included filling recycling boxes with dozens of obsolete Ministry, Board and School publications but much more interesting was the walk-through-time that my own personal binders provided. I have taught many courses over the years; suffice it to say that my binder portfolio included 90% of every science course that ever existed in the province of Ontario along with a smattering of courses from completely unrelated subject areas. Being the type of person I am I have always kept beautifully organized binders for each of these courses, and the more times I taught the course the bigger and more numerous the binders became.
So here is what I observed as I purged through my personal binders. At the beginning of my career I used a lot of material that I photocopied from other educators. These included worksheets, projects, assignments, and even tests. The notes for the students were long and detailed, I would write them word by word onto the blackboard and they would sometimes spend entire periods copying them down. In fact, I remember the advice of my mentor, a master-teacher, gave me during my first year teaching when I had a particularly unruly class, “Just keep them copying out notes all period and they won’t have time to cause any trouble.” Now, I am horrified to think that I actually took this advice and relished in its effectiveness!
Over time the work in my binders became more and more my own. Beautifully designed and produced worksheets, text book activities and lab assignments. All the labs were strictly “cookbook” labs with the purpose, safety, materials, procedure all precisely laid out step-by-careful-step. Observation tables and questions were purposely designed to keep the student tightly focused on the task, analysis and discussion questions flowed one from the other and the conclusion was not even always present! Oh, how magnificent these labs were! The preparation for them, although time consuming, was a very exact affair and I would often leave my classroom at night with everything methodically set up for the next day’s lab -- exactly the right number of beakers, and other required equipment laid out next to my carefully measured and prepared solutions of which I would have neither too much nor too little because I knew exactly what would happen during the upcoming lab.
Do not think, dear reader, that I was alone in my anal ways of teaching high school science. My techniques were widely admired and my resources eagerly sought after by colleagues both near and far. I was well respected for never asking the students a question whose answer could not be found on a specific page of our current text book, for integrating literacy and numeracy throughout my curriculum (before it was cool) by the use of teacher guided practice, for running carefully controlled labs whose outcome was never in doubt and which never took longer than the allotted time. Oh yes! I would proudly share my work with anyone that was interested and even gave workshops and made presentations highlighting my wonderful skills. Imagine how flattered I was when publishers took an interest in my magnificence!
But that was then and this in now. As I continued purging my beautiful binders I could see how my teaching had gradually shifted over time. Some of the change was prompted by the powers that be but most of it was in direct response to what worked and what didn’t work, a little thing we like to call “personal reflection” in the teaching field. Lessons that at one time worked like a well oiled machine had to be tweeked as the nature of the learner changed. Rather than stress myself out because the students no longer carefully read the cookbook lab prior to doing it, sketched out the equipment set up and even answered the analysis questions prior to lab day it was much easier to meet them where they were.
At the time I would have described my evolution as “choosing my battles”, after all one has a finite amount of energy, but in retrospect I see it now as being respectful of who the learners were and what worked for them. Gradually I learned to release control yet facilitate the learning occurring. As the years passed, my binders became less dictatorial and more loosey-goosey. Instead of going from day one to day ninety with rigid lesson plans for each and every day they started to reflect the unit we were working on the “big ideas” that we needed to cover on a weekly basis.
My classroom labs changed from being teacher-directed and controlled as well. Over time I started producing lab handouts with less and less detail filled in thereby allowing the students the opportunity to think about what we were doing. I did, however, keep control of what the lab purpose was; but I expected them to do more of the design, observations and analysis themselves.
Luckily for my students, as the 21st century progressed I became familiar with the Smarter Science way of teaching science. This approach is strictly inquiry based with the students not only designing and conducting the labs themselves but also coming up with the purpose, or question. Through brainstorming the students generate a list of questions that they are wondering about. Then, they answer the ones they can through research. Due to having 21st technology in the classroom this research component can be incredibly quick, even as short as five minutes, depending on what the questions are and what strategy the teacher employs. No more booking the library, searching through vertical files, card catalogs and encyclopedias for this generation! Instant access to quality information is the order of the day. The advent of the Internet has truly been a game changer in our quest for knowledge.
After finding the answers they can by research, the students are now left with maybe one or two outstanding questions. Following the Smarter Science framework and 21st century educational philosophy it is time for them to design their lab investigations to answer the questions they are wondering about. This means they have already established a purpose for doing the lab.
Developing hypotheses often flow from a combination of knowledge acquired during their self directed research and ensuing lively classroom discussions. The teachable moment here is the concept that all hypotheses are acceptable, proving them right or wrong is the point of the lab investigation. Literacy is also naturally built in as the teacher demonstrates the correct method of wording a hypothesis. Since each student “owns” their hypothesis they want to learn how to state it correctly, there is nothing rote or boring about it.
In my binders, which I am now thinking about as historical archives, I actually had activities where I gave the students the crux of the hypothesis and they had to phrase it correctly and even worse than that, labs with the hypothesis given! No wonder there wasn’t any critical thinking happening in their poor little minds.
Once the students have determined for themselves why they are doing the lab (purpose) and what they think the outcome will be (hypothesis) all that  is left for them to do is the fun stuff –design, perform and analyze the lab. This is where it is essential that the teacher is an expert in their field because they are the ones ultimately responsible for the safety of their students. They must ensure that nothing the students propose could potentially cause any harm. They must also be prepared to advise student on various techniques in a just-in-time teaching manner. This means that we teach the technique when the student needs to use it, not when it is on the next page of the text book.
In my binders I had an entire lesson plan with the objective of learning to use a graduated cylinder! I used overheads to show a picture of a meniscus and distributed worksheets with diagrams of graduated cylinders for the students to read the volume level. No actual graduated cylinder was ever in play! I am so embarrassed! And this was a lesson plan I really liked and shared widely!
As I conclude this blog post the recycle truck is actually rolling up my street. Three recycle boxes full to over flowing are being heaved over the side of the truck; all my 20th century teacher “gold” is being hauled away. It was fun while it lasted but nothing compares to the excitement of teaching the 21st century way! I wonder what great discoveries my students will make this year, and in the years to come?

Saturday, June 18, 2011

Father's Day blog Posting -- #36

Father and Daughter
This blog posting is the entry I sent in to the Geekdad contest in an effort to win some cool geek electronics. Although I did not win it lead me to reflect on where my affinity for inquiry-based learning came from. If this story isn’t a classic inquiry than what is? Thanks Dad!

Here is my Geekdad story:
Many years ago I was engaged to be married. Although I was 100% sure I wanted to be married to the man of my dreams I was not so keen on the actual wedding ceremony. Though a series of compromises the wedding was scheduled for 10 o’clock on a Monday morning. Following the church ceremony there would be a sit down lunch catered by some church ladies, the bride and groom would leave on our honeymoon and the partying would continue at my parent’s house. My parent’s house, which is my childhood home, is a large Cape Cod style house that has seen many parties over the years. These parties include some fantastic teenage parties that my sister and I would host when my parents and brothers went on summer vacations without us. (We couldn’t go! We had to work!)  For sure there had been at least 200 kids in our house dancing and jumping up and down on a number of occasions and although there were a number of consequences on a variety of levels the house itself withstood all the partying unscathed and unchanged.
Family Home
This is where the Geek Dad part comes in. My dad, a trained engineer, spent weeks prior to my wedding day fretting, wandering around the house with a measuring tape and  his trusty slide ruler while scribbling little calculations on scraps of paper and the back of napkins. You may think he was upset that his baby girl was marrying, that he was designing a new suit for himself, or that he was calculating the cost of all these shenanigans. But no! This is not how Geek Dads think! What he was actually doing was calculating how great a load the floors of our family home could withstand. What if there were so many people in the house that it collapsed! This was a very real worry for him!
Naturally, like all good daughters, when my Geek Dad tried to talk to me about the consequences of the partying continuing at our family home I just laughed at him. Who ever heard of a house collapsing from the load on the floors during party? I have been at  many parties and I have never heard of such a thing, have you? Our family home is a sturdily build wooden two story house, we had never had any indication that the floors might collapse. All the woodwork was in tiptop condition. Stop worrying, Geek Dad!
The night before my wedding day my father must have conceded that the after-party would, indeed, be at the family home. The father-of-the-bride is easily lost in the shuffle of wedding plans and he had definitely lost this battle. (The story of the force that is my mother shall be told another day!) As a last resort Geek Dad enlisted the help of our Best Man.  He showed him all of his calculations and explained, as only an over wrought engineer can, the potential danger of the wedding guests enjoying one last cup of tea at our family home the next day. To his credit our Best Man listened politely and nodded attentively as my dad instructed him to make the rounds during the wedding feast and dissuade everyone from attending the after-party. He did not, however, act on these carefully laid plans of subterfuge. 


The wedding went off without a hitch, the wedding feast was enjoyed by all, my new husband and I drove off into happily-ever-after and the after-party was in full swing until the wee hours of the morning. Did the floors cave in? Did the house collapse? What do you think?
I love you, Geek Dad!




Monday, May 9, 2011

People's Choice voting Now Open in Google Science Fair 2011

Recently I had the pleasure of being the only Canadian judge in the Google Science Fair which is open to all 13 - 18 year olds worldwide.

The thousands of entries have been narrowed down to the top 60 and the public can now judge them for themselves.

You do not have to be a science teacher to be impressed with the awesome entries you will see here:
  • http://www.google.com/events/sciencefair/vote.html
Be sure to vote in each age category!

Send me a tweet @EurekaTeacher and let me know what you think of the entries.

Saturday, April 23, 2011

Using Gizmos to Grow Plants in Locally Developed Science Class – Posting #27

I have tried using the interactive Gizmos available from ExploreLearning.com with my locally developed science classes in the past and have given up in frustration. This week I tried again but I was much more systematic in the way I scaffolded the lesson plan with the end result being real, authentic learning due to a rich, engaging task.
If you are unfamiliar with Gizmos they are online simulations that power scientific inquiry and understanding. In Ontario they are part of the Ministry of Education’s free software package (OSAPAC) which means they are licensed for use in all of our publically funded schools.  There are many other computer simulation programs available but I shall restrict my comments in this blog to the experience our class had with Gizmos.

If you teach science you are probably well aware that many of the students in our classrooms today have spent very little time outside playing – they have never made mud pies, they have never eaten worms, they have never squashed a bug and they have never grown a plant from a seed. In short, they have never experienced the wonder and awe of nature: one of the fundamental concepts essential not just to life but actually identified in our curriculum documents as  “The overall intention is that all graduates of Ontario secondary schools will achieve excellence and a high degree of scientific literacy while maintaining a sense of wonder about the world around them.”
Bearing the sad reality that our students don’t go outside I purchased two packages of different varieties of marigolds at my local hardware store. I photocopied and enlarged both the front and the back of the seed packages and distributed them to my students. We compared the claims made  while learning new vocabulary, ie. marigolds, germination, varieties. Hence, literacy was embedded into the day’s plan. I then showed them how to plant the seeds and each student planted five seeds of each variety into labeled flower pots.  We are not recording any information on these marigold seeds. We check them every day, we discuss our observations, we feel the soil to determine how damp or dry it is, we water and we even turn the plants since we have become aware of phototropism.  (Eventually these pots of marigolds will be sent home for Mother’s Day presents.)
Now that my students had some prior knowledge of how seeds grow I introduced them to the Tomatosphere Project. We used the Smarter Science framework to set up the tomato seeds as a controlled scientific investigation. (See blog posting # 26) This investigation is ongoing.
Every day we check both our marigold and tomato seeds. The students have a good hands-n understanding or the necessity of light, soil and water for seed germination and plant growth. I have not yet introduced them to the concept of fertilizers or compost – although while we are in the greenhouse we check on the vermi worms. It won’t be long now until they will delve into this project a little deeper!
Last week I introduced the class to Gizmos. In preparation for this lesson I pre-registered each student into a class on the ExploreLearning website.  Using a very large font size and bright yellow paper I then made each of them a checklist of:
1.      The name of the website (ExploreLearning.com)
2.      The class code
3.       Username
4.      Password
5.      Name of gizmo
6.      “Launch gizmo” instructions
Using checklists has been identified as an essential employability skill in the Passport to Learning produced by the Conference Board of Canada. I was surprised when I first read this but then I started using checklists with my students and I was amazed that they did not know what to do with them. After embedding checklists into all of my courses as much as possible I am pleased to report that they have become invaluable to both the students and the course delivery.
The Gizmo we used was Growing Plants in which the learner investigates the growth of three common garden plants: tomatoes, beans, and turnips. They can change the amount of light each plant gets, the amount of water added each day, and the type of soil the seed is planted in then observe the effect of each variable on plant height, plant mass, leaf color and leaf size. They determine what conditions produce the tallest and healthiest plants. Height and mass data are displayed on tables and graphs.
I provided them with the lesson material, Student Exploration Sheet, which is published on the website. As the computers were firing up the students answered the two questions that are to be done prior to using the Gizmo. Since these were both opinion questions the students were easily able to answer.  (What do you think plants need to grow? And How do you think soil helps plants? )  Thus, the students were feeling confident about trying the Gizmo. Although the handout provides clearly worded step-by-step instructions some of the students required individual instruction on how to drag the variables to the pots and let the plants grow virtually. The learning curve was extremely short especially when the students realized that there was no wrong answer! They especially liked watching the time fly by on the clock as the plants grew.
Spontaneously there became a class completion of who could grow the tallest plant. This led to lots of cheering and excitement! Everyone was truly engaged! As the students were able to grow their plants taller and taller they exchanged their strategies with each other.( It will come as no surprise to anyone who is familiar with teenage boys to hear that the boys were the ones most motivated by the competition – gotta love that testosterone!)
After declaring a “new world champion of plant growing”, who happened to be the newest student to arrive in my class, we carried on with the student exploration sheet handout which takes the students through a number of controlled tests.
The students were delighted with the entire process declaring that it was so much quicker than waiting for real days to pass so their plants could grow. Besides completing the Gizmo in a very satisfactory manner a lot of excellent thinking, questioning and discussion resulted from this activity. The talk was allowed to flow throughout the process proving, once again, that “Literacy floats on a sea of talk”.

How have you used computer simulations in science inquires?  Send me a tweet at: 
https://twitter.com/#!/EurekaTeacher