MAT-02.OA.02.b

 

MAT-02 Targeted Standards
(OA) Domain: Operations and Algebraic Thinking
Cluster: Add and subtract within 20.

MAT-02.OA.02.b Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers. Know from memory: The ability to compute math facts with automaticity (3-5 seconds) and confidence (ND).

Student Learning Targets:

Knowledge Targets

  • I can answer subtraction facts to 20 quickly (3-5 seconds).

Reasoning Targets

Skills (Performance) Targets

Product Targets

 

Rubric / Proficiency Scale

Score   Description Sample Activity
4.0 There are no advanced criteria for this task as recall of basic facts is foundational.  Application of this skill will occur within tasks requiring subtraction within 100 and word problems -
  3.5 In addition to Score 3.0 performance, the student demonstrates in-depth inferences and applications regarding the more complex content with partial success.
3.0

Student is able to answer subtraction facts to 20 with at least 90% accuracy given 5 seconds per fact.

I can answer almost all subtraction facts to 20 quickly.

-
  2.5

No major errors or emissions regarding 2.0 content and partial knowledge of the 3.0 content.

Student is able to answer subtraction facts to 20 with 80% accuracy given 5 seconds per fact.

2.0

Student is able to answer subtraction facts to 20 with at least 75% accuracy given 5 seconds per fact.

I can answer many subtraction facts to 20 quickly.

-
  1.5

In addition to 1.0 content, student has partial knowledge of the 2.0 and/or 3.0 content.

Student is able to answer subtraction facts to 20 with 50% accuracy given 5 seconds per fact.

1.0

Student is able to answer subtraction facts to 20 with less than 50% accuracy given 5 seconds per fact.

and

Student is able to answer subtraction facts to 10 with at least 90% accuracy given 5 seconds per fact

I can answer almost all subtraction facts to 10 quickly.

I can answer some subtraction facts to 20 quickly.

-
  0.5

Limited or no understanding of the skill is demonstrated.

Student is able to answer subtraction facts to 10 with at least 90% accuracy given 5 seconds per fact (1st grade target)

Resources

Websites

Vocabulary

  • subtraction facts
  • difference
  • know from memory
  • minus
  • subtract
  • equals

 

» Second Grade Math