If your smile is anything like the smiles on the faces in Liberia then I can imagine it quite well indeed!

That is great - thank you for the work. Physics was a tricky course to teach in my schools as foundational mathematics were severely lacking. I did find, however, that they understood things well if they could see them. One day I had students pair up and time each other pacing 50 meters, then calculate speed from that real data. It stuck!