She struggles with basic addition beyond ten. Tonight's tantrum was borne out of not being able to add 18 and 8. She also doesn't understand lesser/fewer, or concepts such as counting backwards and subtraction beyond 10. I admit to getting massively frustrated which is unhelpful but I am just staggered. She doesn't want to do the work which is a bigger barrier than any and of course....fuels both her and my annoyance. She was recently dropped to the lowest table at school which won't be helping her self esteem and I keep telling her she is good at it etc hut needs to work a bit harder....her teacher doesn't seem to be arsed that her maths is so poor:/