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Interactive Number Equivalency (2nd & 3rd Grade) Second Grade Dream Box – Build Expressions Equal to Twenty. Using expressions that have one to three addends, this tool engages students in understanding various number pairs that equal up to twenty.  Lesson Dream Box – Build Expressions Equal to One Hundred.  Using expressions that have one to three addends, this…

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Interactive Fractions & Decimals Dream Box – Equivalent Fractions on the Number Line.  Students develop understanding of equivalent fractions by placing markers at set intervals along a race course.  Lesson CCSS.MATH.CONTENT.4.NF.B.3.B Decompose a fraction into a sum of fractions with the same denominator in more than one way, recording each decomposition by an equation. Justify decompositions,…

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Number & Operations – Fractions – 4th Grade Extend understanding of fraction equivalence and ordering. CCSS.Math.Content.4.NF.A.2 Compare two fractions with different numerators and different denominators, e.g., by creating common denominators or numerators, or by comparing to a benchmark fraction such as 1/2. Recognize that comparisons are valid only when the two fractions refer to the…

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