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.
There is generally good advice in here, but man when they get it wrong they get it wrong hard core. There is one question in particular about gangs that they completely miss the boat on. However, for less serious things, they give sensible advice.
The American Girl advice books and manuals always seem to give excellent help, and the succor afforded by this volume runs right in that vein. The American Girl Company had received so many letters from kids all around the world who plaintively requested assistance in personal matters, that the company decided it would be a good idea to create a book comprised of such letters that represented common issues, so that they could could respond to the inquiries with thought and deep insight. I think that this book is very good in that regard. The advice is solid and reaches over a variety of relevant subjects, and in my experience it is just about as good for boys as it is for girls. I recommend this book. It is a clear, tangible self-help aid.
I purchased several kid's books for a school library. This one is sort of Dear Abby for kids. Well done as you would expect from the American Girl Library.
most of the advice holds up, but there are a few big misses (for example, one letter from a little girl being bullied about her weight by classmates advised her to diet & exercise)