I just noticed a burst of traffic from a site discussing whether to donate to Wikipedia. Welcome to Beyond Necessity. On donating, I'm not necessarily saying don't, but do check where your money is going first.
If you are logging in from an IP based in the UK, even if you are not from the UK but here on business or pleasure, you will be taken to a page owned by Wikimedia UK. Note that carefully. It says Wikimedia with an 'm' not a 'p', and it says 'UK'. If you are outside the UK you don't get the 'UK' but you still get the 'm'.
Wikimedia is not the same as Wikipedia, so you are not donating to Wikipedia. Now some of the money will go to Wikipedia to pay the costs of running the enormous servers which support the huge Wikipedia traffic. But that is small compared to the sum that Wikimedia spends annually, and in any case you are not supporting the construction of Wikipedia itself, which is entirely written by volunteers. Often very badly written, as I have said many times here. Gregory Kohs has some good financial analysis here.
Wikimedia International (the Wikimedia Foundation) spends lots of money on travel, entertainment, and Sue Gardner's decent salary. But none of this supports Wikipedia itself. As for Wikimedia UK, the money will go entirely on what is listed here, none of which I can make any sense of.
If you want to help education, donate via gift aid to an institution run by competent and qualified staff. I donate generously to the Warburg, which is a great place and offers great courses, and has a great library of Renaissance books. I don't give any money to a bunch of incompetent clowns at Wikimedia UK.