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These are the Transum resources related to the statement: "Pupils should be taught to change freely between related standard units [for example time, length, area, volume/capacity, mass]".

Here are some specific activities, investigations or visual aids we have picked out. Click anywhere in the grey area to access the resource.

- Bottles, Boxes and Cans Estimate the capacity of the bottles, boxes and cans in the photograph and answer questions about volume.
- Converting Standard Units Converting measurements of length, mass, volume and time from one unit of measure to another.
- Imperial Units Pairs Find the matching pairs of equivalent imperial units in this interactive online game.
- Measuring Units Check your knowledge of the units used for measuring with this multiple choice quiz about metric and imperial units.
- Metric Units Pairs Find the matching pairs of equivalent metric units in this interactive online game.
- Mileometer Practice converting between miles and kilometres with this self marking quiz.
- Sorting Units Order the ten containers according to their value (money, length and weight)
- Time calculations on a calculator Time Calculations using Casio Calculator using the Degrees, Minutes and Seconds button.
- Time Sort Arrange the analogue and digital clock faces in order from earliest to latest
- Train Timetables An interactive exercise on reading train timetables and making time calculations.
- Walking Times Questions about the time it takes to walk between places in London according to the Walking Tube Map.

Click on a topic below for suggested lesson starters, resources and activities from Transum.

- Enlargements When areas and volumes are enlarged the results are far from intuitive. Doubling the dimensions of a rectangle produces a similar shape with four times the volume! Doubling the dimensions of a cuboid produces a similar shape with eight times the volume! The activities provided are intended to give pupils experiences of dealing with enlargements so that they better understand the concept and are able to produce diagrams, make models and answer questions on this subject. Once positive scale factors have been mastered the notion of fractional and negative scale factors await discovery!
- Ratio A ratio is a relationship between two numbers of the same kind. In layman's terms a ratio represents, simply, for every amount of one thing, how much there is of another thing. This topic presents a number if different ways pupils can represent ratios and apply their meaning to problem solving situations.

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