Mmm, I remember getting close to the end of DDs first term after her grade skip and how excited I was when she said she couldn't wait for the holidays, that she was tired because school was hard now. That was the goal. Given it took her 8 weeks or so to complain it obviously wasn't THAT hard but never the less she was truly tired out. For her that was the only term she said that, by the end of the next term she was well and truly adjusted and rocketing along. So my thought would be to push through, but encourage the teacher's idea of supporting the new kids a bit more.