The Twitter Glossary

Twitter Dictionary:
A Guide to Understanding Twitter Lingo

Tips to shorten your messages: (Note it is quite difficult to be succinct.  Some users are very careful not to abbreviate but that is hard to do in only 140 characters.)

Ts=teachers   Ps=parents   admin = administrators

Learn how to use abbreviations, like b/c for because, w/o

think of symbols & numbers as part of words: cre8, b4, in2, F2F etc. Really helps!  gr8

If you need more than 140 characters, just add "1 of 2" to the end of your tweet and then "2 of 2" when you start the 2nd.