I’m sure by now using powerpoint is so passé and there is a new ‘fashionable’ technique taking the world by storm (I’m just learning what snapchat is – still not really sure the point of it?) but as i live under a technology stone I’m going to stick with powerpoints. Using powerpoint is an easy resource to display a significant amount of material in creative and memorable way. So here is what I have learnt over the years…
1. Picking the perfect background: I always try to find a background suitable to the material being covered. The reason for this is that your background will play as a memory trigger as well as looking more interesting. If you google: free microsoft templates powerpoint this gives you a lot of websites to browse. I use https://templates.office.com/ but has a limited range so I often turn to www.smiletemplates.com/free/powerpoint–templates/0.html for more variety (only the first three slides are free but just copy and paste). 
