Hi, I'm in my 4th year of high school in Italy (graphic design and communication track) and I really like math, but I've got some gaps from the previous years. I'd like to start over and go through the whole high school program, from year 1 to year 5, at my own pace.
The problem is I don't really know where to start. What books would you recommend? And where can I find them, maybe for free or second-hand? If you know any good YouTube channels, let me know, because I understand things way better with videos than by reading.
Any advice on what order to study the topics in is welcome too. Thanks to anyone who answers