Wendy, First of all, I'm sorry to hear about your son's diagnosis. I hope he is feeling better and that you and your family are starting to adjust to this big change in your lives. Second all, it will get easier! There is so much at first, and everything is new and even 'normal' things feel like a huge challenge with diabetes in the mix. That will get better with time. If you are like me, this may be the first time you are also really needing to work with your insurance co. It just is a lot. Keep asking questions, to everyone, and caring for and loving your son as you always have.
As for school, as others have mentioned, get your dr. to write new scrips for whatever supplies you need for both home and school. If you are not seeing a pediatric endocrinologist, you might want to find one as they will better understand the school stuff and can help you navigate thru it. You will probably be seeing your doctor again soon for follow-up and I think it is pretty normal to adjust prescriptions at that time. But your doctor can do it any time, just ask and say why you need it.
As for the supplies, I would investigate getting insulin pens. You could have your son keep a supply of pen needles at school and at home and just the pen would go back and forth. Or, you can stick with syringes and get the insulin pen vials. You can use them with the syringes just like the big vials. But they're smaller, so you waste less. We use them with my son because even with his pump, we don't go thru a full vial in a month. In addition, they come in a box of 5 vials, and you probably would not go thru all in a month, so you'd pretty quickly accumulate a 'store' of extra vials.
I agree with others though, that it seems pretty ridiculous that your son can't transport needles back and forth. If there are other students with diabetes at the school (or in the district) I would try to talk with them and learn from them.
Just let us know anytime you have questions, need to vent or want to celebrate something!