uke teaching trick

I've been teaching chords in this order - C, G, Am, F. Makes sense for basic songs. Trouble is, G is the hardest and kids who aren't sold on the whole uke thing give up. On Wednesday, I started again with my lowest level kids and taught them Am first, then F, then C, then finally G. After ten minutes, all of them could easily move between Am, F and C (which are very very easy chords) and they had lots of motivation to learn G. Most can now do the whole progression.