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Soak It Up: Illustrating the year 7 standard

The following examples of student work illustrate achievement at the mathematics standard for year 7.
 

The task in this illustration was part of a science investigation into the absorbency of sponges. The class was working on a unit called Fibres and Fabrics from Making Better Sense of the Material World. As part of the unit, the students identified material properties that contribute to absorbency and completed a lesson on fair testing. This task focuses on the mathematical problem solving that took place within the investigation. It relates to achievement objectives for Number and Measurement from the mathematics and statistics learning area in The New Zealand Curriculum.

The Task

Soak It Up

Your class is investigating which of four different types of sponge is the most absorbent. The four sample sponges vary in size.

  1. a. Find the volume of each sponge.
    b. Record how much water each sponge absorbs.
  2. Which sponge is the most absorbent?
     

Some features of students’ work used to make judgments in relation to the year 7 mathematics standard are described below. 

There is also an illustration of the year 6 standard for this task. 
There is also an illustration of the year 8 standard for this task.

New Zealand Curriculum: Level 4 National Standards: By the end of year 7
In solving problems and modelling situations, students will:
Number and Algebra
  • use a range of multiplicative strategies when operating on whole numbers (number strategies and knowledge)

Geometry and Measurement

  • use appropriate scales, devices, and metric units for length, area, volume and capacity, weight (mass), temperature, angle, and time
  • convert between metric units, using whole numbers and commonly used decimals
  • use side or edge lengths to find the perimeters and areas of rectangles, parallelograms, and triangles and the volumes of cuboids (measurement)
Number and Algebra
  • apply additve and multiplicative strategies flexibly to whole numbers, ratios, and equivalent fractions (including percentages)

Geometry and Measurement

  • measure time and the attributes of objects, using metric and other standard measures
  • make simple conversions between units, using whole numbers
  • use side or edge lengths to find the perimeters and areas of rectangles and parallelograms and the volumes of cuboids, given whole-number dimensions

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Breakdown of Waste, Year 5

PDF of this task and Illustrations of the years 6, 7 and 8 standards (1.29MB)