Display the four shapes and take three hands-up answers, not open call-outs. Most pupils will spot the circle (no straight sides, no corners); accept any reasoned answer and revoice it as 'so you are looking at the sides and corners to decide' — that sets up the whole lesson.

Triangle: tap the 3 sides, then the 3 corners; note the counts match.

Square: 4 sides all the same length, 4 corners.

Rectangle: also 4 sides and 4 corners; the difference is side length not number, two long and two short.

Circle: the key noticing is no straight sides and no corners, just one curved edge all the way round.

Pause after each and let the class say it back.

This round is for talking it through together — a pupil taps at the board and the class agrees or corrects out loud.

Send a pupil to the board to tap each side (numbering them) and each corner on the shape shown, then name it. Have the class call the count back together, and revoice a strong answer so the room hears a classmate reason it out. Watch for pupils who count a corner as a side or skip the side they started on — prompt 'where did you begin? count that side once.' Between turns, hold up one of your paper shapes (triangle, square, a many-sided shape) for a couple more pupils so several get a turn, not just one.

These are the practice questions — a pupil answers at the board, the class confirms, then the board moves to the next question. Keep it brisk rather than over-explaining.

Run the four challenges in order. The third one is the thinking one: hold up a paper square and slowly turn it onto its corner while pupils watch, then ask 'did turning it change the number of sides?' The on-screen count confirms it is still four sides. The circle answer is zero straight sides — make sure pupils say zero, not 'one'.

Recap the key noticing: name from parts, and turning a shape never changes its sides or corners. The Pupil Practice page reinforces counting sides and corners on a wider set of shapes.