Recommended

• 211 common irregular verbs (usingenglish.com) http://www.usingenglish.com/reference/irregular-verbs/
• 3000 most common words (wikier.org) http://www.wikier.org/stuff/language/english/3000-most-important-words.pdf
• Classroom English (finchpark.com) http://www.finchpark.com/courses/links/classroom.htm
• Differences: British and American http://www.bg-map.com/us-uk.html#top
• Differences: British, Canadian and American (spelling) http://www3.telus.net/linguisticsissues/BritishCanadianAmerican.htm
• Differences: British, Canadian and American (vocabulary) http://www3.telus.net/linguisticsissues/britishcanadianamericanvocab.html
• English for babies (englishclub.com) http://www.englishclub.com/babies/index.htm
• English for kids (englishclub.com) http://www.englishclub.com/kids/index.htm
• English for students http://www.english-for-students.com/
• Grammar (eflnet.com) http://www.eflnet.com/grammar/index.php
• Incredible English (for young learners) http://elt.oup.com/student/incredibleenglish/?cc=global&selLanguage=en
• Interactive English http://acacia.pntic.mec.es/agip0002/auro/inicio.html
• Learn English http://www.learnenglish.de/
• Learning sites (rong-chang.com) http://www.rong-chang.com/
• Phraseup (assissts you with writing) http://www.phraseup.com
• Punctuation marks http://grammar.yourdictionary.com/punctuation/what/Fourteen-Punctuation-Marks.html
• Vocabulary (eflnet.com) http://www.eflnet.com/vocab/index.php
• Vocabulary (englishclub.com) http://www.englishclub.com/vocabulary/index.htm
• Vocabulary (esl.fis.edu) http://esl.fis.edu/vocab/index.htm
• Vocabulary (languageguide.org) http://www.languageguide.org/english-uk/vocabulary/
• Vocabulary (aprendeingles.net) http://www.aprendeingles.net/portal/index.php?url=http://saberingles.com.ar/games/