Length and Perimeter - Assessment

The Length and Perimeter Assessment for Year 3 is a comprehensive evaluation of students' understanding of measurement concepts. The assessment begins by asking students to measure the length of an object, such as Rosie's pen, to the nearest centimetre using a ruler. Students are then tested on their ability to match equivalent measurements, with one example provided to guide them. The assessment also includes a task where students must select the most appropriate unit of measure—centimetres, metres, or millimetres—for the height of various objects, encouraging them to think critically about the scale of each item.

Further challenges within the assessment involve completing a bar model with missing measurements and expressing confidence levels regarding their understanding of length and perimeter. Students are required to complete part-whole models and convert measurements into millimetres, which tests their ability to work with different units of measure. The assessment also includes questions that ask students to calculate the perimeter of a rectangle and to compare the perimeters of a triangle and a square. Finally, students must write a series of lengths in size order, starting with the shortest, and provide their answers with the correct units. This exercise not only assesses their measurement skills but also their ability to sequence and compare lengths accurately.