## Attend to Precision.

1st Grade

Mathematically proficient students in First Grade attend to precision in their communication, calculations, and measurements.

- Students are able to describe their actions and strategies clearly, using grade-level appropriate vocabulary accurately.
- Their explanations and reasoning regarding their process of finding a solution becomes more precise.
- In varying types of mathematical tasks, first grade students pay attention to details as they work. For example, as students’ ability to attend to position and direction develops, they begin to notice reversals of numerals and self-correct when appropriate.
- When measuring an object, students check to make sure that there are not any gaps or overlaps as they carefully place each unit end to end to measure the object (iterating length units).
- Mathematically proficient first grade students understand the symbols they use (=, >,<) and use clear explanations in discussions with others. For example, for the sentence 4 > 3, a proficient student who is able to attend to precision states, “Four is more than 3” rather than “The alligator eats the four. It’s bigger.”