Measurement connects mathematics to the physical world. Students learn to measure, estimate, and compare using standard units, then represent and interpret data they collect.
Students start with non-standard units (hand spans, cup measures) before progressing to standard metric units. Length: millimetres, centimetres, metres, kilometres. Mass: grams, kilograms. Capacity: millilitres, litres. Key skill: choosing appropriate units and tools (ruler, scale, measuring jug).
Time: reading analogue and digital clocks, elapsed time, calendars. Perimeter: the total distance around a shape — add all side lengths. Area: the surface covered — count square units or use length × width for rectangles. Students discover that shapes with the same perimeter can have different areas.
Students collect data through surveys and experiments, organise it in tally charts and tables, and represent it using pictograms, bar charts, and line graphs. They interpret data by answering questions about most/least popular, range, and mode. PYP emphasises students formulating their own questions to investigate.
IB PYP schools worldwide predominantly use the metric system (SI units) as it is the international standard. However, schools in the US and UK may also introduce imperial units (feet, pounds, gallons) for practical local contexts. The emphasis is on understanding measurement concepts rather than specific unit systems.
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