Hi Goldchilled:
Just wanted to agree with your sentiments above - telling parents this stuff from the start really does help!
also absolutely agree with list Nextphase posted - but would add, that once counting/ adding & taking away from 10 is solid, I'd then move on to 20.
If you haven't come across it then these may be useful:
Oxford Owl has a maths page as well as reading with games/ ideas to help support early maths work here: www.oxfordowl.co.uk/maths - and in fact just checking the address they've expanded activities now for the entirety of primary school.
Woodland Junior School Mathszone is a fantastic resource with all sorts of great links to games to help support concepts: resources.woodlands-junior.kent.sch.uk/maths/
Their number skills page has some really useful worksheets to help build skills with adding up and subtracting to 10, 20 and 100: resources.woodlands-junior.kent.sch.uk/maths/numberskills.html - this is found by clicking addition on maths zone.
Maths Champs has free games ranked by age - so you could start with 5 - 7 age group here: www.mathschamps.co.uk/#home - you may need to play them first yourself to determine if they're about the right level - too hard or too easy.
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Don't forget about simple things you have at home. Board games involving rolling dice and counting along a board reinforces addition skills. Snakes & ladders is ideal for this & you can play it backwards to help with subtraction. Use two dice if you want to work with numbers more than six.
Playing black jack or '21' is really useful for counting to twenty. We played open handed so that our DDs (when they were at that stage) could see our cards and learn about our decision making (whether the stay at the count we have and take another card).
Very simple - The object is to get as close to 21 or exactly 21. If you go over - you're out (or bust). Ace =1, all number cards as shown, Jack/ Queen/ King all = 10. Deal two cards each player (face up at least at first) - work out your count. So say you deal a 3 and a king that = 13. Now do you want another card or do you want to stay there. Say your dealt a 6. 13 + 6 = 19. So you'd probably stay put.
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Finally at some point you may get a note in YR or Y1 saying work on number bonds to 10.
Don't just work on all possible additions to make 10:
1 + 9
2 + 8
3 + 7
4 + 6
5 + 5
6 + 4
7 + 3
8 + 2
9 + 1
also work on number bonds for other numbers (so really bonds for 4, 5, 6, 7, 8 and 9). This will come in handy when adding bigger numbers (and having to carry over) or subtracting (and having to borrow).
HTH