GCM R/Software
Support Materials

Obtaining Software:
Download HLM Student Version here
Download R here

Ross Ihaka's Teaching Web Page (Working through the materials for his courses, starting with Statistics 380,, will teach you a huge amount about what is most useful in R.)

Robert Kabacoff's Quick-R website is a marvelous resource with instructions and examples for accomplishing important basic operations in R, as well as some advanced ones. I find myself returning to this site frequently.

R Utility Functions [[Documentation]]
Reshape Handout
Centering Code
John Fox's Appendix on Mixed Models in R