I help in ds's reception class one afternoon a week. Last week when I was there the teacher put a counting program on the whiteboard. It had a number line from 1 to 20 and questions underneath it, so 14 + 4, 18 - 2 etc.
I was a bit taken aback tbh - have all the children secured their numbers up to 10 yet, never mind up to 20????? This seems very difficult for reception children (and to my mind the teacher should be teaching, not just putting on a computer program - but that's another thread).
Hmm. None of the children could manage without help from the teacher.