Hi - school has just invested heavily in ipads, and I am looking for an app/website that could be used by pupils for a daily numeracy workout. Needs to be free/low cost as we are a secondary of over 1000 pupils. Already subscribe to mymaths. Manga High too expensive I think. Want something that pupils can use independently for say 15 mins a day, but it will track their scores. Ideally want something that can differentiate what questions they get next based on their proficiency. In an ideal world teachers would be able to track progress of whole classes, but I realise that may not be realistic for low cost/free. Anyone use anything similar?