Matemáticas:

• http://nrich.maths.org/frontpage
• http://www.amathsdictionaryforkids.com/mathsCharts.html
• http://www.bbc.co.uk/schools/websites/11_16/site/maths.shtml
• http://www.mathsisfun.com/
• http://www.glencoe.com/sec/math/algebra/algebra1/

  Física y Química:

• http://www.ptable.com/?lang=en
• http://www.sciencekids.co.nz/
• http://highered.mcgraw-hill.com/sites/0073512117/student_view0/chapter1/mastery_quiz.html
• http://kent.skoool.co.uk/keystage4.aspx?id=316
• http://crescentok.com/staff/jaskew/isr/equip/equip2.htm

  Biología y Geología:

• Index Webs

  Inglés:

• http://www.wordreference.com/es/ (Dictionary)
• http://edition.cnn.com/studentnews/
• http://www.breakingnewsenglish.com/
• http://www.bbc.co.uk/worldservice/learningenglish/
• http://www.onestopenglish.com/
• http://www.isabelperez.com/
• http://www.agendaweb.org/links.htm (a website that contains links to a great amount of websites about English language learning).
• http://www.esl-galaxy.com/ (general website)
• http://www.e-grammar.org/ (Grammar explanation)
• http://www.perfect-english-grammar.com/index.html (Useful website with explanations and activities)
• http://www.grammaring.com/ (grammar)
• http://bogglesworldesl.com/ (useful website containing a lot of entertaining stuff)
• http://menuaingles.blogspot.com.es/ (grammar)
• http://www.learnenglish.de/ (general website)
• http://www.xtec.cat/~ogodoy/sac/index.htm (Useful website, especially for Bachillerato)
• http://www.english4allages.com/bachillerato (Another good website for Bachillerato)
• http://www.eoilangreo.net/herminio/online/index.htm (Interesting website with grammar, vocabulary and even fill in the gap activities with songs)
• http://www.collinsdictionary.com/ (monolingual and bilingual dictionary)
• http://www.synonym.com/ (to look up definitions, synonyms and antonyms)
• http://www.howjsay.com/ (phonetic dictionary where you can listen to the pronunciation of the words)
• http://www.nationalgeographic.com/ (This website contains videos, games and quizzes about geography, animals and other interesting topics. Useful for Science).
• http://www.onestopenglish.com/skills/listening/jazz-chants/ (general website).
• https://www.youtube.com/user/bbclearningenglish (BBC Youtube channel for English learners).
• https://www.youtube.com/user/BritishCouncilLEKids (British Council Youtube channel for English learners)
• http://learnenglish.britishcouncil.org/en/ (Excellent general website)