DD has been told that for the mocks coming up in December, they will be assessed only on the double syllabus, not any of the additional triple topics (they have apparently done some of them).
All the books and notes we have are for the triple syllabus, and don't make it immediately clear which bits are also part of combined science and which aren't.
I did a search online, and didn't seem to easily come up with - here is the list of additional topics in triple chemistry not in double (although I did for biology). Could somebody point me to a list?