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In this 3.MD.8 Third Grade Common Core Lesson, studentsfind the perimeter of polygons using knowledge of shapes to solve for missing lengths.
In this 3.MD.4 Third Grade Common Core Lesson, students generate measurement data by measuring lengths using rulers marked with halves and fourths of an inch.
In this 3.MD.2 Third Grade Common Core Lesson, students measure and estimate masses of objects using grams, kilograms and liters.
