Describe inverse relationship between unit size and number of units.
Aligned tasks under 2.9B balance fluency and reasoning so students can explain decisions about Unit size & count.
For Grade 2, this standard focuses on Unit size & count and prepares learners for increasingly complex tasks.
Start with concrete or familiar examples, connect to prior knowledge, model a clear process, and provide checks for understanding aligned to 2.9B.
Standard 2.9B describes the essential skills and understandings for Unit size & count in Grade 2. It clarifies the learning outcomes and what successful work looks like.
It lays groundwork for the next grade by deepening accuracy and flexibility with Unit size & count, 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 2.9B.
