1. Analyzing Student Work
Strategies and Representations

2. Adding and Subtraction Strategies
Teachers must know and teach for strategies such as: • Counting on • Making ten • Decomposing a number leading to a ten • Using the relationship between addition and subtraction • Using a number line • Creating equivalent but simpler or known sums

3. Adding and Subtraction Strategies
Use the NCDPI Unpacking Document for examples and expectations
Resources in Tools4NCTeachers have rubrics and instructional suggestions based on student work
Teachers explain examples of strategies and student work progressions in the videos below

4. Progressions of Student Work
Utilize the table links for more examples and next steps ideas
Math Topic with Link to Representations
Links to Instructional Moves Documents
Addition Within 10
Addition Within 20
Cluster 2 Instructional Moves
Cluster 8 Instructional Moves
Subtraction Within 20
Comparing Numbers
Cluster 3 Instructional Moves
Cluster 4 Instructional Moves
How Many More or Fewer
Cluster 1 Instructional Moves
Change Unknown Problems
Two-Digit Plus Multiple of 10
Cluster 5 Instructional Moves

5. Probing for Student Understanding
Adding within 20
Probe both correct and incorrect answers
Ask questions
Allow students to model and explain
Observe carefully
Focus on student thinking
Help clarify ideas
Note important information
Change Unknown
Subtracting Multiples of Ten
Using Subtraction to Solve
Missing Addend Problem

6. Using Rubrics to Discuss Student Work
Read rubric carefully
Look at what is on students’ papers, not what is implied
Note strategies and representations used
Look for strengths and build on those
Consider next steps