With your interest in Education Technology, I recommend you take a look at Wiziq's virtual classroom and authorstream's power point presentation platform. Both are web based platforms, have a bunch of features and free basic service. Here’s a public class recording you might find of interest.
Hi Graeme and welcome from a neighbour. This is where I have made so many valuable contacts and have learnt so much from being a member of ths site. Have a good look around and keep coming back as there is so much stored here already.