I kind of feel bad suggesting this since the Koala team has been so generous, giving our students 100 free gems recently! ;) But, I have noticed that 100 gems does not go a long way, and $10 is just too much for that many. I give my students 40-50 gems per session, and they are only able to buy 2-3 items with that. There are, of course, so many more things that they want. I realize they can't get everything, and giving us 300 gems each month is awesome! But, I think Koala would make more money if they lowered the prices of gems because more of us teachers would be able to afford them! ;)