SubjectNest · Year 3 maths · Make it fit, then check

Staff complete component keys and next teaching

Do not send this whole bank or recipe/aid-data to learners. Accept correct alternative reasoning and usual communication; physical presentation, speed and amount written are not maths components.

m-later · Mass

Full supplied source: MODEL scale labels 0,100,200,300,400,500 g, with a middle mark in each gap. Pointer is at 350 g. Empty pouch is 70 g and pouch plus pieces is 290 g. Another sealed model package is 210 g. No body weighing or actual local product is involved.

Q1 · Choose a unit and tool for the mass of a small safe package. Explain why.

Worked/acceptable response: g and a scale, for mass; appropriate stable safe familiar tool.

Component: Mass/unit/tool connection

Evidence: independently shown / shown with named cue / partial / not observed. A correct supplied result with adult computation is supported result, not independent reasoning.

Specific unrelated next teaching: Compare attribute questions for a new light object.

Q2 · How big is each marked gap, and what is the pointer reading?

Worked/acceptable response: 50 g gaps; pointer 350 g.

Component: Labelled increment and reading

Evidence: independently shown / shown with named cue / partial / not observed. A correct supplied result with adult computation is supported result, not independent reasoning.

Specific unrelated next teaching: Describe a new scale with 20 g gaps and a new pointer.

Q3 · Find the mass of the pieces without the pouch. Show a connected check.

Worked/acceptable response: 290 − 70 = 220 g; 70 + 220 = 290 g.

Component: Whole/part/net quantity and inverse

Evidence: independently shown / shown with named cue / partial / not observed. A correct supplied result with adult computation is supported result, not independent reasoning.

Specific unrelated next teaching: Draw a new two-part whole including a different tray.

Q4 · Which is heavier: the pointer-reading package or the other package? By how much?

Worked/acceptable response: Pointer package: 350 − 210 = 140 g heavier.

Component: Same-unit comparison and difference

Evidence: independently shown / shown with named cue / partial / not observed. A correct supplied result with adult computation is supported result, not independent reasoning.

Specific unrelated next teaching: Compare two unrelated same-unit readings without judging shape.