I am starting teacher training in September and so have joined some teacher training Facebook groups. We all have to pass professional skills tests in literacy and numeracy. The tests are pretty easy but there is a mental arithmetic test that a lot of trainees are panicking on. A woman has posted that she is doing the mock test and it claims one half plus one quarter is three quarters and she has no idea how the examiners had worked this out. She is not training to be a maths teacher but surely all teachers should know basic maths. I knew this stuff aged 7.