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• name: description content: Math Centers that Deliver — Differentiation Done Right | HappyNumbers.com
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• property: og:description content: While you teach small groups, Happy Numbers serves as an independent math center, providing individualized instruction for the rest of the class.
• name: twitter:title content: Math Centers that Deliver — Differentiation Done Right | HappyNumbers.com
• name: twitter:description content: While you teach small groups, Happy Numbers serves as an independent math center, providing individualized instruction for the rest of the class.
• name: twitter:image:alt content: Math Centers that Deliver — Differentiation Done Right | HappyNumbers.com

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• Those who lag behind their peers by grade 8 have been on this clear trajectory since kindergarten
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