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Week 7: Whole Number Addition and Subtraction
Transcript of Week 7: Whole Number Addition and Subtraction
Supporting Invented Strategies
Types of Invented Strategies*
Properties of Addition and Subtraction
Week 5: Whole Number Addition and Subtraction
a+b = b+a
a+b+c = (a+b)+c
or (a + c) + b
a+0 = a
Commutative and Associative do not apply to subtraction
Thing Numero Uno
: Don't rush
to the standard algorithm!
Thing Numero Dos
: Don't put
away the "toys" too early!
*Even though students aren't technically inventing them, as you are going to build on what they know about place value and show these to them, they are free to use them in multiple ways.
Extending My Little Sister
Ate One Brown Hare...
Starbucks Rewards ?!?
Go to starbucks.com/morestars and make
some notes about the new Rewards program.
Re-cap 5E Lesson Plan and Tiered Activities
Find your partners with Cuisenaires
Cuisi-what? Play time
Basic facts and properties of whole number operations with
Invented strategies for addition/subtraction
What if little sister loved the peas and kept on going...
55 things and a 17 strawberry tarts?
79 things and a dozen chocolate cupcakes?
Oh my goodness...
Which do you prefer? Why?
Find your partners
You are either in a group of 3...
Or a group of 2...
in the 5E Model
: What do I want students to know?
: How do I want them to know it?
Assessment: How will I know if they know it?
: What will I do if they don't?
Basic Types of Formative Assessment
VDW Ch. 5 (p. 85-94)
Whole class (
Sm Group/Indiv (
Index cards & math journal
Translation task ( )
Download the app/set up account
Print or buy cards
Assign cards to students
Add icons to cards if your kiddos need scaffolding
Create multiple choice questions or T/F questions
Take a few minutes and play with the rods.
Write down things you notice about them.
Think Addition (-)
Take away (-)
Moving Beyond Place Value Models
Think Addition and Take Away
94 - 58
Early Number Concepts (2)
Stages of Counting (1)
Parts of a TEKS (3)
Big ideas of place value (1)
Properties of addition and subtraction (2)
Student-invented strategies for addition and subtraction (1 problem in 2 ways)