Ideas for teaching ds place value

[breadandbutterfly]

Having seen the wonderful ideas and links given to a parent asking for ideas on teaching number bonds, can anyone suggest ways to teach place value? My ds, who is 5, in yr 1, can do a fair bit of adding and subtracting up to 100 in his head, but as he doesn't seem to have grasped the concept of place value, it's a bit hit and miss. His teacher this year is rubbish, sadly - he's already forgotten lots of stuff he knew last year - so given that he's interested and wants to learn now, can anyone suggest some tips or links? (His teacher looked v flustered when I asked at the parents' evening when they covered place value and said the summer term, which seems rather late for such a basic concept?)

Esp I'd like to know how to introduce the concept - he seems to struggle with the idea that the 2 in 21, say, = 2 tens and not 2 (though he can work out 37-5=32, say, or 22+22+44 in his head - I'm just not sure how he's doing it!).

I get my class to read the number out loud. So 478 we would say four hundred (how much is the 4 in 478 worth? write 400) and seventy (how much is the 7 in 478 worth? write 70) eight (how much is the 8 in 478 worth ? write 8) and repeat as many times as it takes to fix the idea.

We use Big Maths so use the Squigglesworth character for place value

A whole section on place value here

thanks - mrz, the simple, blindingly obvious ideas are always the best (and of course the ones one never actually thinks of...).

Liked the look of that Big maths programme - wish they used that at ds's school. exoticfruits - thanks, ds will enjoy some of those games.

I sometimes use chairs labelled hundreds, tens and units (thousands, tenths, whatever the class needs) and get children to sit in particular chairs (with one child, you could just put post-its on particular chairs). We then talk about how much a digit is 'worth' in each chair.

(And move them all up one place to multiply by 10, and enjoy forcing the units to leap over the decimal point (on a small hurdle from the games shed) when dividing by 10...)

Thanks. :)