Lesson 2

Addition Facts I Know

Est. Class Sessions: 1–2
X

Mathematical Standards

1.OA.C
Add and subtract within 20. (1.OA.C.6)
1.OA.D
Work with addition and subtraction equations. (1.OA.D.8)

Standards for Mathematical Practice

MP2.
Reason quantitatively.
MP6.
Attend to precision.
MP7.
Look for and make use of structure.

Students practice the Addition Flash Cards for Groups A and B. They identify patterns relating to strategies for addition on an Addition Facts I Know chart.

Content in this Lesson

  • Using mental math strategies to solve addition fact in Groups A and B [E12].
  • Applying the property of zero to solve addition facts in Groups A and B [E12].
  • Using turn-around facts to solve addition problems in Groups A and B [E13].

Daily Practice and Problems C–D

C. Zero

D. Addition and Subtraction Strategies

X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Book

 Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Student Pairs

envelope to store flash cards
paper clip
10 connecting cubes

Materials for the Teacher

Display of Addition Facts I Know (Student Activity Book) Page 237
Display of Sorting Flash Cards Board Master (Teacher Guide)
Demonstration set of Addition Flash Cards: Groups A and B (Teacher Guide)
Unit 9 Assessment Record
Math Facts Class Record

Materials Preparation

Prepare Addition Flash Cards. Copy the Addition Flash Cards: Groups A and B using heavier paper or card stock. Cut the flash cards apart and store them in an envelope for each student. You may want to provide each student with two sets, one to use at school and one to take home.

Assessment in this Lesson

Assessment Expectation Assessed
Addition Flash Cards: Groups A and B
Teacher Guide - digital
and
Addition Facts I Know
Student Activity Book
Page 237
Self Assessment
E12. 
Demonstrate fluency with the addition facts in Groups A and B.
DPP Item C
Zero
Teacher Guide - digital
E12. 
Demonstrate fluency with the addition facts in Groups A and B.
E13. 
Determine the unknown number in an addition or subtraction sentence relating three whole numbers for the facts in Groups A and B.