Greetings!
Using the proper search terms can make a big difference in how long you spend looking for sources before you can begin writing. Let's see how many relevant terms we can think of. The question asks about boys and girls, school, and family, but these terms are probably too general to be of much use. Making them more specific, we can get: gender, education, child psychology, family dynamics -- and I'm sure there are more. Try using them in various combinations. You can also try running the question itself through a search, using all the words, and see what you get.
Once you've done this, you should have some sources to get started with, whether books, journal articles, or some other source. Those references may lead you to others, too, of course.
See if this helps you get started!
Thanks,
Sarah, EssayForum.com
Sarah, EssayForum.com