This thesis investigates how (if at all) children ought to be influenced with respect to religion(s). To answer this question, I develop a theory of cognitive curriculum content and apply it to the teaching of religious beliefs and beliefs about religions. By ‘a theory of cognitive curriculum content,’ I mean a theory that determines which truth-claims belong on the curriculum, and whether or not teachers ought to promote students’ belief of those claims. I extend this theory to help educators to decide which attitudes address on the curriculum and whether or not to promote them. I then apply this to the case of religious attitudes and attitudes about religions. I argue that where having or failing to have a certain attitude makes a significant difference to students’ lives, it ought to be addressed by curricula. Where failing to have the attitude is irrational, this failure ought to be remedied; where having the attitude is irrational, that attitude ought to be discouraged; and where neither having nor failing to have the attitude is irrational, that attitude ought to be introduced and discussed without encouragement or discouragement. In so far as is practicable, educators should aim to acquaint students with arguments for and against having these attitudes and initiate them into the practice of assessing their soundness. The implications of this theory for extra-curricular influence, such as upbringing in the home, are also explored.