How much does it cost for tuition for a catholic high school on long island? And how do you pay it? Do you pay monthly? And if so how much do you have to pay per month? I want to send my kids to one of the high schools like Holy Trinity or St Anthonys. I've tried to find tuition prices on the website, but I don't think they want you to know how much tuition cost because they don't tell you. If someone could please help me, it would help. thank you.