Well-organized Classical Links: Bruce R. Magee's page
UK site created by innovative teachers: ARLT
Grammar & Dictionaries
University of Arkansas Grammar
Fast, downloadable dictionary-Whitaker's Words
Perseus English-Latin Dictionary
Latin Morph tool
Laura Gibbs' excellent advice
Self Study & Materials for Teachers
Consortium--Classics and Technology
The Latin Library--look here first!
I heartily recommend these texts.