Performance task rubric · Units and Conversion, Surface Area and Volume, Practical Measurement and Cost Estimation

Practical measurement or conversion solution

Task. Design a solution to a measurement problem in your community: for example, a rainwater tank for a classroom roof, paint for a school wall, or converting a recipe for a canteen of 200. Produce a concrete or visual model (scale drawing, net, or 3D model) with the computations and a cost estimate.

Performance standard: Design and present a practical measurement or conversion solution with a concrete or visual model.

Learner / group

Criteria	4 · Excellent	3 · Proficient	2 · Developing	1 · Beginning	Weight	Score
Measurements and conversions	All measurements use appropriate units; conversions are correct and shown with unit factors.	Appropriate units; one conversion error.	Units mixed or two or more conversion errors.	Units ignored or arbitrary.	25%	—
Comment on “Measurements and conversions”
Area, volume and formulas	Correct formulas for every shape, including composite solids; results are rounded sensibly.	Correct formulas; a slip in a composite or in rounding.	Wrong formula for one shape.	Formulas missing or misapplied throughout.	25%	—
Comment on “Area, volume and formulas”
Model quality	Model is to scale, labelled with dimensions, and matches the computations.	Model is labelled but not fully to scale.	Model is rough or partly labelled.	No model.	20%	—
Comment on “Model quality”
Cost estimate and practicality	Materials listed with local prices, waste allowance included, total is realistic.	Materials and prices listed; no waste allowance.	Partial cost estimate.	No cost estimate.	20%	—
Comment on “Cost estimate and practicality”
Presentation	Clear explanation of the problem, method and result; answers questions confidently.	Clear explanation with minor gaps.	Explanation hard to follow.	No explanation.	10%	—
Comment on “Presentation”
Total					100%	0/5 scored

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