When I have moved up a level, from what I understand Kwiziq will not test me on anything from previous levels unless I switch back to the level. My general question is this: how often do people review and improve previous levels? But more specifically:
I think I read on here somewhere that the suggested time to move up is when you achieve 75% in a level. Is it recommended to return often, e.g. every day or two, until getting it up to 100%, or less frequently?
Finally, when lower levels are at 100%, how often is it recommended to return to them?