I suppose I've homeschooled maths enough to answer... I bought DS10 a calculator when he was 2 and we had an unexpected 2 hour wait in an airport and there was nothing more promising in the airport shop - good decision! It wouldn't have occurred to me to worry about allowing him to use a calculator, though of course there have been occasions when we've joked about how of course he isn't to use a calculator for < thing where the arithmetic is the point >. He's never had a problem with arithmetic, and has always accepted happily that he needs to be good at it with or without a calculator, so maybe this is no help - or maybe this is exactly how to play it! Interested to read what others have to say.
