I wasn't being rude, I genuinely wondered where you got the idea from and I now understand it's common practice in the school you are at and the school your friends are at. It isn't at my school and wasn't at my placement school. I am an NQT so had my first classroom this year. The essentials were all there and whatever else I needed I either got from other classes or I bought and claimed back, within the provided budget of course. I definitely don't make enough money to spend it on resources and besides, it's wrong. Imagine joining an office and being expected to buy your own pens and notebooks. What I would invest in though are suitable clothes and a good pair of shoes because you will be on your feet all day.