2.1.E

Math2nd Grade

The Standard

create and use representations to organize, record, and communicate mathematical ideas

Texas Essential Knowledge and Skills for Mathematics

Teacher's field guide

What Students Need to Do: Students show their math thinking with objects, pictures, number lines, tables, words, or equations. They choose a useful form and explain how it matches the idea or solution.
What Mastery Looks Like: A student can show one idea with objects, a drawing, and an equation. The representations match, include clear labels, and help another person understand the student’s thinking.
Common Misconceptions: Students may draw pictures that do not match the numbers or operation. They may treat each model as a separate answer instead of another way to show the same idea. Labels and symbols are often missing.
How to Assess It: Give the prompt, “Show 27 + 15 with a drawing and an equation, then write one sentence explaining how they match.”

Lesson moves

Have students build 36 with base-ten blocks, sketch the blocks, and write a matching number sentence.
Show two models of 42 and ask, “How are these alike, and which one explains the number more clearly?”
Play a matching game using cards with word problems, equations, number lines, and base-ten drawings.
Survey classmates’ favorite fruits, record results with tally marks, make a picture graph, and state one fact shown by both representations.

Keep exploring

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