$1 Math Center Spotlight: The Case of the Missing Number

Who doesn’t love a good mystery? The Case of the Missing Number is an addition concepts center that will help your students use bar models to find missing addends and sums.

Directions: Help the detectives solve the Case of the Missing Number! Match the missing parts and sums to the bar models. Complete a record sheet when you are finished.

This printable math center includes the following materials:

  1. 36 bar model cards (12 missing large addend, 12 missing small addend, 12 missing sum)
  2. “Directions” page, storage label, and a record sheet
  3. Color and black & white versions to help you save on ink!

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!

Stop by next Monday for another $1 Math Center Spotlight! More first grade math centers for addition concepts can be found here:

In case you missed it, check out last week’s spotlight about organizing, representing, and interpreting data: Camp Puzzles!

Published by Little Owl's Teacher Treats

Erika @ Little Owl’s Teacher Treats believes in creating warm, engaging classroom environments that are inclusive of all students. She earned her Bachelor’s degree in Elementary Education from Penn State University in 2008, and a Master of Arts in Mathematics Education, K-6 from Western Governors University in 2016. She also studied Reading Education at the graduate level at the University of Pittsburgh. Erika taught 5th grade for a year, but she found her true calling teaching first grade for eight years.

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