the subjunctive in adverbial clauses http://www.studyspanish.com/lessons/subj8.htm
if clauses http://users.ipfw.edu/jehle/courses/condic.htm#If-clauses
games such as crossword puzzles http://el-mundo.es/pasatiempos
if clause quiz http://spanish.allinfo-about.com/tests/siclauses-test.html
online verb conjugator - quiz yourself! http://www.spaleon.com
electronic flashcards http://www.emporia.edu/biosci/span/flshcrd.htm
subjunctive exercises from Ojala que llueva cafe http://www.colby.edu/~bknelson/exercises/subj1_forms.html
grammar exercises http://www.trinity.edu/mstroud/grammar/index.html
grammar explanations and exercises http://www.studyspanish.com/lessons/pretimp2.htm
subjunctive in adjective clauses http://www.trinity.edu/mstroud/grammar/subjp1.htm
good subjunctive exercises http://www.usna.edu/LangStudy/spanish_subjunctive.html
ser vs. estar http://www.trinity.edu/mstroud/grammar/descrip.htm
great explanation of pronoun usage in Spanish http://www.drlemon.net/Grammar/indirectobjects.html
verb conjugator http://www.conjuguemos.com
preterite vs. imperfect http://php.indiana.edu/~jsoto/PreteritoImperfecto.html
practice the preterite and the imperfect with superman http://www.colby.edu/~bknelson/exercises/superhombre.html
present perfect indicative vs. subjunctive http://www.colby.edu/~bknelson/exercises/perfects_ind_subj.html
relative pronouns (click on "ver un repaso" first. Then do exercise. http://www.colby.edu/~bknelson/exercises/relative_pronouns.html
good general site http://www.spanish4all.com
por vs para http://www.studyspanish.com/lessons/porpara.htm
por vs. para http://www.colby.edu/~bknelson/exercises/por_para.html
present perfect practice http://www.colby.edu/~bknelson/exercises/pres_perf.html
present perfect http://academics.vmi.edu/modlan_kbb/hotpotatoesquiz/presperf.htm
if clauses - go to the section called "conditions" http://www.trinity.edu/mstroud/grammar/index.html