1. Have a look at the English Department website from IES Ruiz de Alda

http://alerce.pntic.mec.es/~aroa0017//dpto%20ingles.html

2. Try this link and choose elementary level to review:

a) Verbs: present simple & continuous, question words, past tenses....
b) Vocabulary
c) Grammar

http://www.agendaweb.org/

3. Click on this link for : grammar, vocabulary & culture quizzes

http://isabelperez.com/grammar.htm