Proportions

Curriculum – Measurement 

For students to measure and compare length, mass, capacity, area, temperature of objects/materials, and the passage of time, using non-standard units, through free exploration, focused exploration, and guided activity.

Context

Students and the teacher begin by sitting on the floor in a circle.

Materials

  • Different sizes of squares and rectangles (Appendix A, B, C & D).

For appendices download the lesson plan here.

Lesson
Introduction

  • Set out two shapes – a rectangle and a longer rectangle (Appendix A). Ask students what they notice about those two shapes.
    • Allow students to share their observation about the two rectangles. Common observations include one is bigger than the other or they are both rectangles etc.

Lesson

  • Ask students, if you wanted to fill up the rest of the space on the longer rectangle, what would you have to do?
    • Have students prove their theories about how they would fill the larger rectangle with the shorter one.
      Bring out another shape – a small spare (Appendix B). Ask students what they notice about that shape when it is compared with the two other shapes.
    • Have students share their ideas

Closure

  • Fill in the rest of the numbers and ask students what they notice about all of the lined up rods.

Based on Carol Stephenson’s Mathematics Lesson