## Reflection: Staircase of Complexity A 10 Party! - Section 4: Station Time

I have been working in complements of ten for most of the year.  It is something that I believe you need to start early to obtain the expected fluency by the end of first grade.  I have several students that have mastered their complements of ten and have been working on complements of 20.During station time, I had those students engage in the same activities but with a focus on 20 rather than 10.  Below are the links to the adapted activities.  Each link will bring you the description and the recording sheets that you will need.

Go Fish, Making 20: http://cc.betterlesson.com/lesson/580953/go-fish  You will have to read the reflection in this lesson.

Making 20 With Number Cards: http://cc.betterlesson.com/lesson/575482/complements-of-10 You will need to read the section titled Making Complements of 10 with Ten Frame Cards.

Complements of 20 (With a 20 sided die):  Each student will need a 20 sided die.  They should roll the die and then write an equation using the roiled number and the complement that makes 20.  The student should then show how they used their knowledge of 10 to solve for 20.  I have included the recording sheet and an example of a completed sheet.

Staircase of Complexity: Differentiating For Those Fluent WIth Complements fo 10

# A 10 Party!

Unit 11: The Number 10 and the Addition and Subtraction Concept
Lesson 7 of 17

## Objective: SWBAT use relationships among different combinations of 10. SWBAT fluently produce complements of 10.

### Thomas Young

203 Lessons14 new

## Big Idea: Students are engaged in a choice of activities that develop conceptual knowledge and fluency of complements of 10.

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Subject(s):
Math, survey, 1st Grade, complements of 10, complements fo 20, equation
65 minutes

### Thomas Young

203 Lessons | 14 new

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