1/2 Have a sense for symmetrical completion of forms on upright axis (early in Class 1) and as horizontal reflections
3 Ability to complete 'complex' symmetries including left/right, above/below with crossing at mid-point (a certain maturity is needed for this). (Assuming the children have crossed the nine year Rubicon.)
2/3 'Carrying numbers' in + e.g. 19 + 2 and x e.g. 74 x 2
2/3 Can tell time at least hours, half past, and quarters
1 Knows meaning in use of + - x
2/3 Subtraction from 'smaller units' (e.g. 12-9) at this stage this is best done by decomposition - from whole to part.