Kelly’s Solution is a multi-digit multiplication problem in which fifth grade students are asked to crtique the work of a student. The student work highlights a common error of forgetting to leave a place holder when multiplying by the ten’s place during multiplication. Students must recognize the student’s error by examining the work shown, correcting the error, and providing the correct answer to the problem.
Microsoft Word version: 5_OA_MultiplicationMultiDigitAlgorithm_Problem_Critique_KellysSolution
PDF version: 5_OA_MultiplicationMultiDigitAlgorithm_Problem_Critique_KellysSolution
I used this task with my 3rd grade students. The purpose of this task was to notice how to use regrouping when subtracting. I wanted students to recognize and understand when it is appropriate to regroup when subtracting. The students were given 2 different answers for the same subtraction problem. The student had to decide which answer was correct. The student had a place to include their claim and argument, as well as have time to discuss with a partner and record their partner’s thoughts.
This task is an application of double-digit subtraction. Students must critique student work that uses subtraction incorrectly. The student work highlights a common error in multi-digit subtraction in which students forget to borrow when subtracting a larger digit from a smaller digit. The task encourages partner share and uses argumentation language including claim and evidence.
Microsoft Word version: 3_NBT_SubtractionMultiDigitAlgorithm_Problem_Critique
PDF version: 3_NBT_SubtractionMultiDigitAlgorithm_Problem_Critique
Airplanes in the Toyshop is a multi-digit subtraction problem used in a third-grade classroom to reinforce the use of the subtraction algorithm. Students are given a word problem about how many planes are left after a certain amount are sold and must critique a student response. Argumentation language is used when asking students to create a claim and provide evidence when critiquing the provided response.
Microsoft Word version: 3_NBT_SubtractionMultiDigitAlgorithm_Problem_Critique_AirplanesInTheToyshop
PDF version: 3_NBT_SubtractionMultiDigitAlgorithm_Problem_Critique_AirplanesInTheToyshop
Second graders are required to solve double digit addition number problems with and without regrouping. They sometimes have a problem determining whether or not they need to regroup. In this problem they need to explain how they solved it and what tool they used. Most students would choose to use place value blocks or a hundreds or two hundreds chart to prove their answer.
Microsoft Word version: Gr_2_OA_AdditionMultiDigit_Problem_Critique
PDF version: 2_OA_AdditionMultiDigit_Problem_Critique