School work can cover a wide area. What is more important is the likely number of pages being printed and whether only black and white is needed or occasional use of colour.
Once you have some idea about that then you may receive more meaningful help. Many modern printers are very cheap but they then get you with the ink costs. You can also get cheap s/h on eBay or even in your local free newspapers (where you also might get the oportunity to see it working before handing over your cash).
Some manufacturers (eg.,Epson) also sell refurbished models at very good prices on their site and this should not be ignored as you still get a full guarantee.
Personally I would sticjk with the big boys, Epson, Canon and HP but that is personal choice.
I have an Epson myself but I use a Continuous Ink Supply System so I need never buy another cartridge. A bit more expensive to begin with but saves a fortune over the years.