学校用怎么说用英语

"What do you use in school?" or "What do you use at school?" are both good ways to ask about the things that are used in school in English. Alternatively, you could also ask "What materials do you use in school?" or "What resources do you use in school?"
It's worth noting that "school" can refer to either primary/elementary school, middle/secondary school, or university/college, so you may want to specify which type of school you are asking about. For example, you could ask "What do you use in elementary school?" or "What do you use in college?" to be more specific.