Is counting in 3's on the Year 1 syllabus or is it a nice to have - building a foundation for the 3 times tables for next year?
I just fail to see the benefit of learning to count forwards and backwards in 3's - isn't 2's. 5'5 and 10's sufficient? I'd never consider counting in 3's.
My ds is struggling with this (amoung other things) and I'm wondering whether it's worth focusing on this when other bit of Maths seem more useful.