## Reflection: Rigor Simplifying Expressions Day One - Section 2: Bell Ringer

Several sites will tell you to boot Miss Sally out and replace with a rich conceptual understanding.  I say keep Miss Sally in you Mnemonic bag of tricks.  Please Excuse My Dear Aunt Sally is a critical Mnemonic go to for students that has stood the test of time.  Once again we are weening our students off of the calculator.  They will need these type of gimmicks if you will to help with the steps of the process.  I see nothing wrong with it.  PEMDAS is taught in the lower grades, thus if bringing it into your instruction for this lesson it will be review.

My students still struggled with if the equation is left with just addition and subtraction or just multiplication and division that they then will go left to right.  Many wanted to follow the exact order of the Mnemonic Device.

Order of Operations! PEMDAS will never get old! Do not boot it from your bag of tricks.
Rigor: Order of Operations! PEMDAS will never get old! Do not boot it from your bag of tricks.

# Simplifying Expressions Day One

Unit 8: Expressions and Equations
Lesson 2 of 25

## Big Idea: : Students will need a strong background in distributive property when simplifying expressions. This is a great lesson to fill in gaps with students who may lack understanding with distributive property.

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Standards:
Subject(s):
Math, Simplifying Equations and Expressions, Integers, Number Sense and Operations, Expressions (Algebra), distributive property, nested parentheses, no calculator
35 minutes

### Malissa Thomas-St.Clair

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