How do you teach little children who don't listen?!

School today was a nightmare of a morning. We'd only had 6 hours sleep in 2 days (we arrived back in Jipijapa at 2am Monday morning and had to get up at 6.30am for school, and Monday afternoon we took a bus to Puerto Lopez [a beach about 1 and a half hours away] and stayed the night. We were drinking in a pub until 2.30am, then went back to the hostel only to get up again at 5.30am to get the bus back to Jipijapa to be in time for school! It was slightly crazy, and we were all dead today), and for some reason, for the last 2 days, the kids have had absolutely no concentration and paid no attention to anything we tried to teach them. It was insane! I was so dead that I really could not be bothered doing anything, plus was not in the best state due to alcohol the previous night. So we took the easy option and combined the kids, so the 2 of us could teach them together (i.e. 1 person talks while the other rests. It was a good option!). We tried to teach them about the environment, but due to their immense lack of attention, I doubt they remembered, or even understood, anything. Actually, they didn't, because we quizzed them about it later via a game (another easy way to teach, kinda like putting on a video, but we don't have that luxury), and they couldn't answer even the easiest questions. Ugh, how very frustrating!