Apply basic fact strategies to add and subtract within 20 (including make‑10 and decomposing a number leading to a 10).
Teachers can use 1.3D to sequence instruction on Basic facts to 20 (strategies) and monitor progress toward mastery.
This standard clarifies expectations for Basic facts to 20 (strategies) so lesson goals, checks for understanding, and feedback stay aligned.
Start with concrete or familiar examples, connect to prior knowledge, model a clear process, and provide checks for understanding aligned to 1.3D.
Standard 1.3D describes the essential skills and understandings for Basic facts to 20 (strategies) in Grade 1. It clarifies the learning outcomes and what successful work looks like.
It lays groundwork for the next grade by deepening accuracy and flexibility with Basic facts to 20 (strategies), so students can tackle more complex problems later.
Use short exit tickets and tasks where students explain decisions, show multiple representations, or justify answers—directly aligned to 1.3D.
