Florida B.E.S.T. MA.3.GR.2.1
The Standard
Explore area as an attribute of a two-dimensional figure by covering the figure with unit squares without gaps or overlaps. Find areas of rectangles by counting unit squares.
Florida B.E.S.T. Standards for Mathematics
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students cover rectangles and other flat shapes with equal square tiles, leaving no gaps or overlaps. They count the tiles to find area in square units.
What Mastery Looks Like
- A student covers a shape completely with equal square tiles and counts each tile once. The student states the area using square units and explains that the count measures the covered space.
Common Misconceptions
- Students may leave gaps, overlap tiles, or use squares of different sizes. Some count grid lines instead of squares, or report a linear unit instead of square units.
How to Assess It
- Give each student a 3-by-5 rectangle on a square grid. Ask, "Shade every unit square, find the area, and explain how you counted."
Lesson moves
Ways to Teach It
Give pairs a 4-by-6 paper rectangle and square tiles; have them cover it completely, then record the area with square units.
Show one correctly tiled rectangle and one with gaps; ask, "Which model measures area fairly, and why?"
Students roll two number cubes, draw that rectangle on grid paper, count its squares, and earn one point for a correct area.
Students count how many square floor tiles would cover a drawn patio, then compare the tile counts for two patio plans.
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Printable MA.3.GR.2.1 Worksheet
A ready-to-print activity worksheet aligned to MA.3.GR.2.1, with an answer key for the teacher on its own page. No account needed.
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