ACMMG019 Measure A What can you Observe students in discussion Each group is given Provide lots of Assorted and compare the measurement is find in the around the activity process or a straw (each is of opportunities for standard and lengths and capacities a comparison of classroom the variation: Comparing length different length) to students to non-standard of pairs of objects the size of one that is about of feet. Can students explain measure their estimate and then materials for using uniform informal object with the as long as why they need to measure table/desks. A measure lengths measuring, such units. size of another your arm? using: reporter from each (guess and check) as counters, group reports the using hand spans, string, unifix length and width of arm spans, steps, cubes, pop sticks, • uniform units of measure their desk. Ask the shoes (heel to toe), plastic milk students why the pencils, pop sticks, bottle caps or • no gaps and overlaps results are so matchsticks, straws. different. Support straws,rulers, and 1.1.7 discussion until the envelopes. Measurement students realise Informal that the straws are Units of different lengths. This leads to the conclusion that you need a uniform unit of measurement. Repeat the process using the uniform unit of measurement (straws of the same le CONTENT STUDENT TOPIC KEY IDEA Pre-ASSESS ASSESSMENT INVESTIGATION RESOURCES DESCRIPTOR JOURNAL
1.1.7 Measurement Informal Units ACMMG019 Measure and compare the lengths and capacities of pairs of objects using uniform informal units. A measurement is a comparison of the size of one object with the size of another What can you find in the classroom that is about as long as your arm? Observe students in discussion around the activity process or the variation: Comparing length of feet. Can students explain why they need to measure using: • uniform units of measure • no gaps and overlaps Each group is given a straw (each is of different length) to measure their table/desks. A reporter from each group reports the length and width of their desk. Ask the students why the results are so different. Support discussion until the students realise that the straws are of different lengths. This leads to the conclusion that you need a uniform unit of measurement. Repeat the process using the uniform unit of measurement (straws of the same le Provide lots of opportunities for students to estimate and then measure lengths (guess and check) using hand spans, arm spans, steps, shoes (heel to toe), pencils, pop sticks, matchsticks, straws,rulers, and envelopes. Assorted standard and non-standard materials for measuring, such as counters, string, unifix cubes, pop sticks, plastic milk bottle caps or straws. TOPIC CONTENT DESCRIPTOR KEY IDEA Pre-ASSESS ASSESSMENT INVESTIGATION STUDENT JOURNAL RESOURCES