I had this site: The True Size of Africa pointed out by Seb Schmoller on Twitter @sebschmoller – found it staggering! You can download the full image from the linked site but I thought it might be useful to re-jig the image so it can be more usefully used in schools.
The countries which are superimposed on the map:
I didn’t appreciate the scale of Africa until now!
I hope you find it useful!