TEKS Math 1.3.F

Math1st Grade

The Standard

generate and solve problem situations when given a number sentence involving addition or subtraction of numbers within 20

Texas Essential Knowledge and Skills for Mathematics

Teacher's field guide

What Students Need to Do: Students use a given addition or subtraction number sentence to make a matching story problem. They solve the story using numbers within 20 and explain how the equation matches.
What Mastery Looks Like: A student can create a clear joining, separating, or comparing story for a given number sentence. The student solves it and explains how each number fits the story.
Common Misconceptions: Students may write a story that does not match the operation, such as joining objects for subtraction. They may reverse subtraction quantities or leave out what the question asks.
How to Assess It: Give students 14 − 6 = 8. Ask them to draw or write a matching story and label the answer.

Lesson moves

Give pairs 15 counters and the sentence 9 + 6 = 15, then have them act out and draw a matching story.
Show 12 − 4 = 8 and ask, “What could happen in a story that matches each number?”
Play Equation Story Match with cards showing number sentences, pictures, and short word problems for students to pair.
Use a classroom snack count, such as 7 crackers plus 5 crackers, and have students write and solve a matching story.

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