How often have you had the need to draw a graph of the depth of water against time whilst you fill up various different containers? I can't remember the last time I saw such a question in an exam (but could be wrong - you all have far more experience than me), so why do ALL the textbooks (including the Edexcel endorsed Ox-Box ones) always use this type of example? I'm scared of not covering it in case it does get included in the paper, but I find it so annoying to teach as it's totally not "real-life" despite its title. (I have no problem with things being taught and tested purely for the benefit of learning them - but not when it gets referred to as "real life" by the examiner) Bit of a rant, I suppose, but, to get to my question, does anyone have any other suggestions to go alongside water/time and distance(from home)/time. I've done lots of real life linear graphs which work well, but am having a bit of a creative block here ... I was thinking of something to do with money, but then realised that taking £10 out of your account is instantaneous rather than a "flow". So maybe that's why it's always water and distance, as they're continuous and are easy for the kids to conceptualise .... hmmm may have answered my question here!