GRAMMAR AND VOCABULARY RESOURCES

Oxford University Press resources:
http://elt.oup.com/student/englishfile/elementary/?cc=global&selLanguage=en

Grammar:
http://perso.wanadoo.es/autoenglish/freeexercises.htm (theory and practice)
http://www.autoenglish.org/freeexercises.htm
http://www.eslprintables.com/ (exercises and worksheets)
http://www.bogglesworld.com/ (resources)
http://www.slideshare.net/ (compilation of power points of different topics)

Vocabulary:
http://www.visualthesaurus.com/ (semantic fields with images)
http://www.visuwords.com/ (synonyms)
http://www.eflnet.com/vocabulary (vocabulary with images)
http://www.theteacherscorner.net (crosswords and others)

Miscellaneous:
Here it is a link with different websites to improve your English.
http://www.eoimanresa.cat/Usuarios/D08129/archivos_rad/WEBS_INTERES_ANLGES.pdf
http://www.nelliemuller.com/icebrakers (funny activities)
http://www.sitesforteachers.com/
http://www.teacherfirst.com/
http://www.eslflow.com/
http://www.esl-galaxy.com/
http://www.biologycorner.com/ (biology domain with interesting lessons)