123ICT Curriculum resources share some great free online classroom countdown timers. Countdown timers can be used in many ways: clearing up ready for playtime, finishing off work, spelling or tables tests and more. Here are a range of free timers which can be projected on to a whiteboard, which may add a little interest and excitement to various projects. When using a big timer to count down for: timed writing, timed research, timed problem solving etc,  there will be no doubt about how much time students still have left for their task. (123ICT Review by Carol Rainbow.)