Phone numbers
Whenever you find a phone number in the game, try calling it. For example, the number in the "Save The Manatees" book in the library, the torn note for the pharmacy in the school halls, Tony's pizza by the phones, the judo club near the gym, the detective's number in Jake's locker (the newspaper) , the number on the matchbook in the boiler room (after you are locked in), and Maxine's Diner number on the same matchbook and containers (after locked in).

Funny Responses
Try calling one of the following numbers for some funny responses:

The number on Eloise's card (555-1204)
The police tip line from the article in Jake's locker (555-4855).
The drug store (555-3784)
Tony's pizza (number on sign by phone).
The Judo club (555-5836).
The Save The Manaties Club (number in book at library)
Maxine's Diner (number on matchbook in boiler room after sabotage).

Coded messages
On almost every bulletin board in the school are pieces of paper stuck with pushpins that have messages that do not make any sense. Take a real mirror and hold it up to the paper displayed on screen. Also, in the library there are some books and charts with secret codes. One is "Don't run Nancy" and another is "The bolt cutter you must take!".