This is a site to sell fairground rides so it gives videos of them all - great for use if you are talking about forces in Physics or even using the idea of making a theme park for design or maths
Make your own 'Loop' cards (Follow me cards) with a number of examples already set. Limit of a set of 14 cards which is a bit of a pity as most will have 30 (or more) in a class so would need 15 even for 1 between two.
Make your own maths worksheets with number ranges and operations you define (including decimals). Presented in column format.
New Zealand maths problem site differentiated into 5 levels
Simple on screen calculator - useful for whiteboard work. The page also has links to Number square, advanced calculator, Frodo logo, Dungeon Logo, teaching clock and number counter.