Useful links
Online dictionaries
Grammar exercises and explanatory pages
http://www.englishgrammarsecrets.com/
http://www.englisch-hilfen.de/en/grammar/active_passive.htm
http://www.ego4u.de/de/cram-up/grammar/tenses
http://www.e-teaching-austria.at/02_cont/03content/03_englisch/English%20Tenses/
http://www.english-4u.de/tenses.htm
http://www.englishpage.com/verbpage/verbtenseintro.html
http://www.bbc.co.uk/worldservice/learningenglish/
Beistrichregeln/comma rules: http://www.myenglishteacher.
Online tests and exams
http://www.cambridgeenglish.org/test-your-english/
idioms & phrases
http://kaplaninternational.com/blog/category/illustrations/
songs with texts, mp3s
http://www.youtube.com/watch?v=3pvf_OBuJVE
http://www.youtube.com/user/
http://www.youtube.com/watch?
Audios & tapescripts
http://www.wordheard.org/sort/
http://www.elllo.org/mobile/
https://www.dropbox.com/sh/
Videos:
mouse trap http://www.youtube.com/watch?v=Plz9JxsnhH4
Scott Thornbury at New school http://www.youtube.com/watch?v=L2q9B2BEV2U
blog tools:
Extras:
https://delicious.com/brigittefalkner