Students sit in their seats, look around the room, and record objects whose lengths they have estimated to be about the same as the ones on the list. Students share what they have recorded and explain their reasoning behind their estimates. Students then select appropriate measuring tools to actually measure the lengths of the objects, record each length to the nearest whole unit, and compare each actual measurement to the measurement they chose as their estimate. The student selects and uses appropriate units and procedures to measure length and area. Clarifying Activity Students go on a scavenger hunt around the school grounds to find objects that have a given perimeter.
Students use appropriate measurement tools to verify their choices.
Clarifying Activity Students work in small groups to estimate, then measure and calculate, the perimeters of the chalkboards and bulletin boards in the classroom. Each group can then design a patterned border to trim around the chalkboard or bulletin board they measured. Students can use multiplication, division, and calculators to determine how long the pattern can be for it to fit evenly around the board. The student selects and uses appropriate units and procedures to measure length and area. Clarifying Activity Students use a rubberband to outline a polygon on a geoboard and count the number of square units enclosed by the rubberband to find the area of the polygon.