## Reflection: Student Led Inquiry Forecasting Sales and Calculating Revenue - Day 1 of 2 - Section 3: Extend

One really different (and interesting) aspect of this lesson is that we ended it with a lot of uncertainty about how to multiply two matrices together. Only a handful of students successfully multiplied the price and sales matrices on their graphing calculator, and even after looking at it together most students did not understand why it worked and why other possibilities did not.

A few students vocalized that they were still really confused about this; I had to specify that we are not going to have closure on this today but I promised them that they would understand it tomorrow.

I think that students were uneasy about how we ended the lesson, but I heard so many enthusiastic "a-ha's" as they worked on the homework and figured out the algorithm of matrix multiplication. This type of excited response would not have been possible if I would have just explained this process at the end of the lesson.

Ending with Uncertainty
Student Led Inquiry: Ending with Uncertainty

# Forecasting Sales and Calculating Revenue - Day 1 of 2

Unit 8: Matrices and Systems
Lesson 2 of 16

## Big Idea: Matrix multiplication is needed for the Purrrrrfect Cat Toy Company!

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Standards:
Subject(s):
Math, Precalculus and Calculus, Algebra, Systems of Equations and Inequalities, matrix, Matrices, Matrix Operations, Matrix Multiplication
55 minutes

### Tim Marley

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