Hi I'm a science teacher who has been given a middle ability year 5 maths set. Obviously I can do the maths to that level perfectly well, but I don't have the 'bank' of activities, techniques and lessons that comes with being trained and experienced in a subject. The year group as a whole haven't done brilliantly on the basics of the four operations (column methods, long division, short/long multiplication) and the HoD has asked us to spend a few weeks next term on hammering these. Can anyone recommend or point me toward some ideas and techniques for the basics? thanks!