Florida B.E.S.T. MA.3.GR.2

MA.3.GR.2 is a B.E.S.T. standard. These are the benchmarks under it.

• MA.3.GR.2.1

  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...

• MA.3.GR.2.2

  Find the area of a rectangle with whole-number side lengths using a visual model and a multiplication formula.

• MA.3.GR.2.3

  Solve mathematical and real-world problems involving the perimeter and area of rectangles with whole-number side lengths using a visual model and a formula.

• MA.3.GR.2.4

  Solve mathematical and real-world problems involving the perimeter and area of composite figures composed of non-overlapping rectangles with whole-number side l...

01

What Students Need to Do

Students find the distance around a rectangle and the number of square units inside it. They solve word problems by deciding whether the situation involves covering a space or measuring its boundary.

02

What Mastery Looks Like

Students choose area or perimeter from the context, use the correct calculation, and label units correctly. They can draw and label a rectangle to explain their work.

03

Common Misconceptions

Students often confuse the boundary with the space inside. They may multiply for perimeter, add only two sides, or label area with linear units instead of square units.

04

How to Assess It

Use this exit ticket: A garden is 8 feet long and 5 feet wide. Find the fencing needed and the area covered, showing work and units.

1. 01

   Build rectangles with square tiles, trace each boundary with string, then record length, width, area, and perimeter.

2. 02

   Ask, “A rectangle has an area of 24 square units; what could its dimensions and perimeter be?”

3. 03

   Play a matching game with rectangle diagrams, dimensions, area values, and perimeter values on separate cards.

4. 04

   Measure a classroom tabletop, then calculate the trim needed around its edge and paper needed to cover it.

• MA.4.GR.2

  The 4th Grade version of this standard.

• MA.4.GR.2.2

  Solve problems involving rectangles with the same perimeter and different areas or with the same area and different perimeters.

• MA.4.GR.2.1

  Solve perimeter and area mathematical and real-world problems, including problems with unknown sides, for rectangles with whole-number side lengths.