# Series Math Routines with Kristin Gray: First Grade : Addition & Subtraction Number String: First Grade

Math.1.OA.D.8

Common core State Standards

• Math:  Math
• 1:  Grade 1
• OA:  Operations & Algebraic Thinking
• D:  Work with addition and subtraction equations
• 8:
Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = - 3, 6 + 6 = .

Download Common Core State Standards (PDF 1.2 MB)

## Addition & Subtraction Number String: First Grade

Lesson Objective: The number string routine encourages students to use what they know about the meaning of the equal sign and operations to find the missing piece of an equation
Grade 1 / Math / Tch DIY
18 MIN
Math.1.OA.D.8

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The number string routine encourages students to use what they know about the meaning of the equal sign and operations to find the missing piece of an equation.

## Discussion and Supporting Materials

### Thought starters

1. The number string routine encourages students to use what they know about the meaning of the equal sign and operations to find the missing piece of an equation.?

Many students are not engaged here. Should a number talk be short and focused? If each student has a white board, then all students would be engaged and as a teacher you could see how all students are thinking. Sharing would still happen, but each student would be involved.

Recommended (0)

Do you ever call on students who don't raise their hands? If not, what is your reasoning?

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I love the setting, and working with partners. This is great critical thinking and strategy work. I also like that they are not intimidated to try and answer the problem even if they are wrong.
Recommended (0)
Great job of focusing on the student's thinking more than the correct answer.
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I like the way the teacher gave the students wait time. The students also had to justify their way of thinking.
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### School Details

Shields (Richard A.) Elementary School
910 Shields Avenue
Lewes DE 19958
Population: 723

Data Provided By:

### Teachers

Kristin Gray
Math / Kindergarten 1 2 3 4 5 / Teacher

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