This math lab is based off of Dan Meyer’s video “Nana’s Chocolate Milk” Pure genius!
I chose to make chocolate milk with the students and demonstrated the milk quandary live; but you can just as easily view the video and apply the same materials. This is a great observed lesson that you may want to have recorded.
Just google it, it’s amazing and really get the kids thinking in terms of ratio and proportional relationships without realizing they’re applying math.
The story: Nana likes her chocolate milk with just the right amount of chocolateyness. She likes to have 4 scoops of chocolate for every 1 cup of milk. However, when I made the chocolate milk, I put in 5 scoops of chocolate. The objective is to then correct the milk for this error so that the taste is the same.
Prompt students with questions before they put their thought on paper. What did you observe? How does the level of chocolateyness compare? Can this be fixed? Do we have to change both ingredients or is it possible to correct the milk by changing just one ingredient?
This lesson includes:
-Mini Lesson/Recording sheet
-4 extended concept activities, I drew the pictures using the app Brushes on my iPad (here students correct Nana’s lemonade, café latte, Shirley temple and eggs)
-Exit Ticket (advanced)
-Exit Ticket (general)
It is suggested to distribute the exit ticket before the demonstration so that students get an idea of what they will be expected to do by the end of class.
Answer Key’s with possible solutions included, keep in mind that all solutions here are possible solutions; there are an infinite number of solutions.
*Clarify to students that they cannot remove ingredients, but have to add onto it. Whether they add one ingredient or more, it’s the taste that matters, not how much you have. Nana is THAT picky ☺
*You could also put a table up on the board, and incorporate that as a part of your mid-workshop interruption with a focus on “What patterns do you see?”
*A great closing is to make connections to real life and that the next time someone screws up a recipe we can say: “Don’t worry. I gotchu with my ratio and proportional reasoning.”
When I taught this, i ended up giving the exit ticket as homework.
I also let the students make their own chocolate milk after they came up with their solutions then they continued to work at their own pace on the extensions.