The latest and greatest STEM Challenge of all time!
I had this Brain Pop one night. It happens to me all the time- just random thoughts of greatness. Usually.
I mean, sometimes, I think of great things and then they become a disaster. One day I will have to tell you about letting kids shave crayons in my STEM Lab. Yeah, well, trust me, don’t try it.
Anyway, back to my Brain Pop! I was searching for something STEM-related and came across a blog that was showing some neat kitchen experiments she does with her very little kids. This made me think about what we could cook at school…. which led to thinking about cooking on a griddle, since I don’t have a stove in the lab…but I do have a griddle …..which led to pancakes. Because, that’s why I even have a griddle, for pancakes.
So, I’m thinking…we are going to cook pancakes, but how can I make that an experiment or design challenge. Ha! Easy Peasy!
First, I found a recipe that did not include eggs. I really did not want to even contemplate having kids crack open eggs. I found one that used milk, water, oil, flour, sugar, and baking powder. This is good, right?
So, what’s next? Well, I needed to reduce the recipe so that it made a very tiny pancake. A little bit of math, no problem. I was very excited. I practiced at home and then again on the griddle at school.
Onward, to the lab!
Big mistake. I truly expected that kids would know how to measure flour.
I even showed them to use the edge of a knife to level off the tablespoon. They could do it, but it took nine hundred years. They had never done this or were being very careful. I don’t know. It just took way too long.
Cooking the First Batch
Then we cooked our tiny pancakes and tasted them.
YUCK! They did not look like the one in this photo. They were flat and rubbery.
Now, I know what you are thinking. I said the math to reduce the recipe was easy, but somehow I messed it up.
Nope! I did the math correctly. I just PURPOSELY left out the baking powder in the first batch. The pancakes were flat and gummy and like rubber.
So, we talked about this and also about the chemical reaction of baking powder….See how I got that science lesson in there!
Next, we tried another version, but this time the kids added whatever amount of baking powder they wanted to add- but they did have to choose from four specific measurements.
I also had learned my lesson about the flour so this time I pre-measured the ingredients into little cups.
This time when we cooked the pancakes you could see something really odd happening… the surface of the pancakes began to have all these little bubbles!
The kids were very excited as they watched those bubbles forming.
Got some science in there again!
Well, ultimately the testing of different measurements and keeping data of the results led each group to declare a certain amount of baking powder was the best. Some of them felt rather strongly that three-fourths a teaspoon was the best. I knew it would be too much. Did I tell them? Nah!
They had to increase their recipe! Giant math problem as every measurement of ingredients had to be multiplied by 8- and these were fraction amounts. Pretty clever how I got some math in this activity, don’t you think?
The final batch of pancakes made a large pancake for every student. They brought toppings and ate until their little tummies hurt. The ones that used too much baking powder had giant biscuits instead of pancakes, but when you put chocolate chips and syrup on that it tastes pretty good!
I’d say we learned a lot!
This is a super fun challenge and my resource covers everything- including management tips for using this with a large class! Click on any of the images to see the details in my store.