Reinforce addition concepts in your first grade classroom with this hands- on, Common Core- aligned math activity! Evidence Files will help your students practice making 6, 7, 8, and 9 using addition, subtraction, unifix cubes, tallies, and dice. Use this center to supplement any standards- based, 1st grade math curriculum! 

First Grade Common Core Math Standard: 1.OA.A.1 Use addition and subtraction within 20

Directions: Shuffle the small cards and place them face down. Flip one card at a time. Solve the problem on the card and place it with the correct Top Secret Number File. 

This printable math center includes:

• 72 sort cards (18 cards per number)
• Directions, storage label, and 8 options for record sheets
• Color and black & white versions to help you save on ink!

Check out the preview for an up- close look!

How to use this in your classroom:

1. Assign as an individual, partner, or small-group center!
2. Engage your students during targeted, small-group instruction!
3. Invite students to use when they finish other assignments early!
4. Prep your sub plans with ease- called away to a meeting? Unexpected sick day? Your students will love playing this math game individually, in partners/groups, or teacher vs. student on a document camera!
5. Fill extra time at the end of a lesson with a meaningful, standards-based activity!
6. Print black & white copies to send home with your struggling students for extra practice!

Find this center in the following bundles:

1. First Grade Math Centers BUNDLE | Addition Concepts
2. First Grade Math Centers BIG BUNDLE | Addition and Subtraction
3. First Grade Math Centers MEGA BUNDLE | 64 Standards- Based Activities

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*** Sample my work with these FREEBIES:

Freebie for Set 1: Good Clues, Bad Clues

Freebie for Set 2: Zoo Break

Freebie for Set 3: Put 'Em to Bed - for Google Slides(TM)

Freebie for Set 4: To the Rescue

Freebie for Set 6: Fill the Nest

Freebie for Set 7: Super Star

Freebie for Set 8: New Tools, Broken Tools

Freebie for Set 9: Feeding Time

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Find more engaging first grade math centers from Little Owl’s Teacher Treats:

Set 1: Addition Concepts

Set 2: Subtraction Concepts

Set 3: Addition Strategies

Set 4: Subtraction Strategies

Set 5: Addition and Subtraction Relationships

Set 6: Count and Model Numbers

Set 7: Compare Numbers

Set 8: Two-Digit Addition and Subtraction

Set 9: Measurement

Set 10: Represent Data

Set 11: Three-Dimensional Geometry

Set 12: Two- Dimensional Geometry

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