My younger kid was not reading in kindergarten and his teacher was very worked up about it. We were adamant that it was not a problem and that he would read when he was ready to read. By the end of first grade he was reading well beyond his peers. By third grade he was getting in trouble for reading in class after he had done his classwork. Sometimes teachers can be stupid just like everyone else. In any case, letting the rascal sneak in extra reading is not really a problem.