23.11.10

Review of a "bad" Word Problem

"Mrs. Phillpott is a cook for the Thornberry family. She usually makes a 5 pound roast for dinner on Thursdays. She knows that it takes 2 1/2 hours to cook this roast. Her boss is having a dinner party and she needs to make more food. She decides that she needs 15 pounds of meat. The problem is that she only has one oven and it will not hold a roast bigger than 10 pounds. How could she solve this problem? Answer in paragraph form."


I have a few issues with this problem. Firstly it is not very relatable, how many student's families will have cooks?! It also implies the Thornberry family is of a certain social class. They have a 5 pound roast every week and host a dinner party for which they require 15 pounds of meat. This may be upsetting for students whose parents struggle financially. 

I also find the wording of this problem terrible for a math problem. It is worded in such a way that no math is necessary. "She cooks her normal 5 pound roast and goes to the grocery store and buys 10 pounds of cold roast" would be a perfectly correct answer based on what is given. The problem states that she requires more "food" and she decides she needs "15 pounds of meat", at no point does it specify the oven must be used or that the meat must be a roast, which would make for a more interesting and mathematical problem.

Answering in words rather than numbers and equations is good to get students thinking more deeply but it is not effective when the solution could well be "she goes to the store and buys 15 pounds of tinned meat"!

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