Guided Math Whole Group and Teacher-Led Small Group Lessons for Third GradeDownload the Free Standards-Alignment for Guided MathMeasurement, Elapsed Time, Area & PerimeterThis unit focuses on three main concepts: measurement, elapsed time, and area and perimeter. The measurement component of this unit explores the customary and metric units of capacity, weight, mass, and length, as well as how to measure figures using a ruler. The concepts of area and perimeter are taught, and the process of