Length and area

Students use standard units to measure and estimate liquid volumes in liters using beakers and graduated containers.

3.MD.A.2: Measure and estimate liquid volumes and masses of objects using standard units of grams (g), kilograms (kg), and liters ...

Students use balances and scales to measure and estimate the mass of objects in grams and kilograms.

3.MD.A.2: Measure and estimate liquid volumes and masses of objects using standard units of grams (g), kilograms (kg), and liters ...

Students solve one-step word problems involving addition, subtraction, multiplication, or division of liquid volumes and masses.

3.MD.A.2: Measure and estimate liquid volumes and masses of objects using standard units of grams (g), kilograms (kg), and liters ...

Students recognize area as an attribute of plane figures and understand that it measures the amount of surface a shape covers.

Students understand that a square with side length 1 unit is called a unit square and use unit squares to measure area.

Students tile rectangles without gaps or overlaps and count unit squares to determine area in square units.

Students measure the areas of various shapes by counting unit squares, including square centimeters, square meters, and square inches.

3.MD.C.6: Measure areas by counting unit squares (square cm, square m, square in, square ft., and improvised units).

Students discover that the area of a rectangle can be found by multiplying the number of rows by the number of columns.

3.MD.C.6: Measure areas by counting unit squares (square cm, square m, square in, square ft., and improvised units).

Students use the formula length times width to calculate the area of rectangles and verify by counting unit squares.

3.MD.C.6: Measure areas by counting unit squares (square cm, square m, square in, square ft., and improvised units).

Students find the perimeter of polygons by adding the lengths of all sides and distinguish perimeter from area.

3.MD.D.8: Solve real-world and mathematical problems involving perimeters of polygons, including finding the perimeter given the s...

Students solve real-world problems that require finding the perimeter of polygons, including finding an unknown side length.

3.MD.D.8: Solve real-world and mathematical problems involving perimeters of polygons, including finding the perimeter given the s...

Students explore how rectangles with the same perimeter can have different areas and solve problems involving both measurements.

3.MD.D.8: Solve real-world and mathematical problems involving perimeters of polygons, including finding the perimeter given the s...