The courses are not on sale to bring your interests on science, that should be the purpose for public compulsory education, which I think is doing what it is in

The courses are not on sale to bring your interests on science, that should be the purpose for public compulsory education, which I think is doing what it is intended before the cram schools took up. The cram school is being evaluated by one metric and one metric only: how much boost can it offer to the kids' test score.