The site is organized by grade and activities are aligned to the Common Core State Standards (CCSS). Within the navigation the activities are further classified under headings such as Operations & Algebraic Thinking, Number & Operations in Base Ten, Number & Operations – Fractions, Measurement & Data, Geometry. You can drill down further to a specific standard for the grade. Clips can be categorized as SUPPORTS, MEETS or EXTENDS a standard so teachers have flexibility to select activities that suit the mixture of student abilities in their classroom.
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SUPPORTS 4.MD.A.1:Know relative sizes of measurement units within one system of units including km, m, cm; kg, g; lb, oz.; l, ml; hr, min, sec. Within a single system of measurement, express measurements in a larger unit in terms of a smaller unit. Record measurement equivalents in a two-column table. For example, know that 1 ft is 12 times as long as 1 in. Express the length of a 4 ft snake as 48 in. Generate a conversion table for feet and inches listing the number pairs (1, 12), (2, 24), (3, 36)