A back-to-school gift for you: Web sites to help you through most any subject By David Colker Los Angeles Times It's great to get a new laptop, music player and cellphone for heading back to school. But here's a tech item you can use free: a list of Web sites on a variety of academic topics. Most include links for exploring subjects in detail. Cut this article out and tape it up in your dorm room, your apartment, your Mom's basement or wherever you do your studying. First up: a group of sites you definitely want to bookmark no matter what classes you'll be taking this year.