Too old, and I def. question some of the advice.
If a classmate is cheating, it's none of your business. If you do feel compelled to do something, see if you can figure out why she's doing so... maybe her parents won't accept bad grades or maybe she's very insecure.
Learn that spiders are good & helpful. Don't even think about killing them. If you must, take them outside.
If your coach says someone 'throws like a girl' and mocks you as a feminist for objecting, it's a big deal. Recruit parents and friends to strongly object, and don't give up until he realizes what he's doing is wrong, or until he's fired.
I do like the few pages in here about how to budget, clean & organize your room, and relieve summer boredom.
Much, but far from all, is aimed at kids from relatively healthy families. Some kids need to ask for help from teachers, counselors, librarians, but that's not sufficiently addressed.
LFL find.