Take three hands-up answers, not open call-outs. Hold up a real box and run a finger along one edge, then touch one corner, to seed the words edge and corner before they are named on screen.

• Cube and cuboid — point out they share the same counts (6, 12, 8); a cuboid is just a stretched cube.
• Square-based pyramid — the point on top is where four edges meet, so it is a vertex too; count all five.
• Cylinder — pause here. Ask 'where could a corner be?' before revealing there is none — the curved surface never forms a point.

Talk this one through together — pupils take turns at the board and the class agrees or corrects out loud.

Rotate the shape before tallying so no face is hidden. Watch for pupils double-counting an edge or missing the back faces — slow the rotation and re-tap together. When the cylinder comes up, hold out for the class agreeing it has zero vertices.

Worked match first (before chips): write exactly six faces on the board. Recheck counts aloud with the class: cube 6, cuboid 6, pyramid 5, cylinder 2. Circle cube and cuboid as the match; cross pyramid and cylinder. Slip to watch: pupils naming only the cube and forgetting the cuboid also has six.

Then the practice round, pupils take turns at the board, check each answer, class confirms. Keep board work brisk. Pass real solids from the basket while one pupil answers on screen; the rest hold and check. Cylinder-vertices is the make-or-break one; expect a wrong guess and revoice why a curved surface makes no corner.

Extension: fast finishers only, off the board: find two solids that share the same number of vertices but a different number of faces (e.g. a triangular prism and a pentagonal pyramid both have six vertices).