## Reflection: Real World Applications Composition of Functions, Day 1 of 2 - Section 1: Bell Work

Today as we discussed the bell problem a student comment on how much she liked how I use problems that they could encounter during my teaching. She stated how this made understanding easier for her.

I was happy to know that she understood I was trying to make the material relevant.  I know that many times math seems very abstract especially in the higher levels. We do have to do what I call "naked math" to prepare for college and high stakes tests. Using the real world examples really engages the students.

In the classes students were arguing for what they thought was the correct answer. They were trying numbers and seeing that the difference was \$3 no matter what the amount spent happened to be. We even extended the idea with what if a person was given \$20 what would the difference be or what would happen if the person gets 20% off.

When I took the problem to symbols and brought in the vocabulary the students were engaged and quick to see how to do the problems.

Relevance
Real World Applications: Relevance

# Composition of Functions, Day 1 of 2

Unit 2: Functions and Piecewise Functions
Lesson 8 of 15

## Big Idea: By using graphs, tables, equations and real world problems students use function composition to solve problems

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Standards:
Subject(s):
Math, modeling, Precalculus and Calculus, composition of functions, function, PreCalculus, interpreting functions in context, function
40 minutes

### Katharine Sparks

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