I'll bet you can't stump Dr. Math! This doctor is really a team of Swarthmore graduate students on-line to answer your e-mail about math. Sure, you can ask about decimals, algebra and long division, but can these electronic tutors answer questions about math facts and trivia, like who invented the plus sign? And why we need fractions? And who invented math, anyway? Of course. If you're frustrated, don't give up. Try Dr. Math, who always has time and is always ready with an e-smile. When you ask for help on your own stumper, take a second to read other questions and answers. You may find help you didn't even know you were looking for!

The Internet Public Library Teen Division may change the way you feel about libraries. This is one of the most diverse sites out there, created with what you want in mind. IPL Teen Division gives you links to info about almost anything you can think of, from music, TV, movies and comics to social issues you and your friends might be concerned about, like depression, violence, and health and sexuality. You can even ask real college students about college life and read their advice and answers to questions others have asked. There are links to on-line 'zines put out by cyber teens like you, as well as Web-based clubs and sports groups. If you are looking for a place to begin an Internet exploration, or if you have a certain topic in mind, IPL Teen Division is the place to begin.

Besides being some of the funniest on-line creatures, worms are underground farmers who have been hip to recycling way before people caught on. Without them, much of what we throw out would still be sitting around in heaps. These wiggly creatures have decided to change the way we think about them-they aren't yucky!-so they've set up a Web page. Go see for yourself just how wonderful worms are. Listen to worm interviews and jazzy worm poems.

Then play some cool worm games, like Worm Lib. You fill in the blanks, and out comes an outrageous story guaranteed to tickle your funny bone. Give worms a chance-you're sure to have fun at Worm World, and hey, you may even come away with some warm feelings about our earthy friends! Charles Darwin once said about worms, ''It may be doubted whether there are many other animals in the world which have played so important a part in the history of the world.'' Quite a statement, and not the least bit exaggerated!

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