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Teaching about sound in the classroom used to involve lots of fiddly bits of kit such as Signal Generators and Decibel Meters that would cost a lot of money and only get wheeled out once a year. Thankfully if you have an iPhone or iPad you can replace quite a bit of that kit with a couple of handy apps which are either free or relatively inexpensive. Read more http://www.whiteboardblog.co.uk/2013/01/ipad-apps-for-teaching-about-sound/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed:+TheWhiteboardBlog+(The+Whiteboard+Blog)