A good online adjunct to an Attic (and some Koine) class in Houston. Site includes full grammar notes, exercises, soundfiles, etc for first (http://www.class.uh.edu/MCL/faculty/pozzi/grnl1/grnl1.gateway.htm) and second http://www.class.uh.edu/MCL/faculty/pozzi/grnl2/gateway2.htm) semesters; hyperlinked syllabi for third (http://viking.coe.uh.edu/dcpozzi/grnl3/grnl3syl.htm) and fourth (http://viking.coe.uh.edu/dcpozzi/grnl3/grnl4/grnl4.syl.htm) semesters are also available.
Discovered via the Anamathetes (http://groups.yahoo.com/group/anamathetes) online self-study discussion list.