My dd just finished first grade, and I would say yes, there is a big difference between kindergarten and first grade in her school. The kids are expected to be more responsible, they get homework, they are tested and graded, they are expected to make up any work they miss, etc.
I don't quite understand why your friend's child would have to attend summer school though. In my district they do have summer school for children who need remedial help, but it is not for children who handle K well.
I don't quite understand why your friend's child would have to attend summer school though. In my district they do have summer school for children who need remedial help, but it is not for children who handle K well.