Wh- questins, WHO, WHAT, WHICH, WHO, THAT, WHOSE...?

Who, What?
http://www.englisch-hilfen.de/en/grammar/frage.htm

WHICH, WHO, THAT, WHOSE
explanation:
http://www.englisch-hilfen.de/en/grammar/who_which.htm

exercises:
http://www.englisch-hilfen.de/en/exercises/pronouns/relative_pronouns.htm
http://www.englisch-hilfen.de/en/exercises/pronouns/relative_pronouns2.htm
http://perso.wanadoo.es/autoenglish/gr.which.i.htm
http://uepd.quizport.com/mod/hotpot/view.php?id=419
http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-8377.php
http://www.eflnet.com/grammar/relpronoun.php
http://www.esltower.com/GRAMMARQUIZ/intermediate/relative%20pronoun.htm
http://www.englishpage.com/minitutorials/who_whom.html
http://www.english-test.net/esl/learn/english/grammar/ei079/esl-test.php

more advanced:
http://www.ihbristol.com/learn-online/exercise-general/intermediate/grammar/who-what-which-where-/5/
http://www.englishclub.com/vocabulary/wh-question-words.htm
http://www.ego4u.com/en/cram-up/grammar/relative-clauses/exercises?08

Wh- questions
http://www.oup.com/elt/global/products/project3rdedition/level2/unit1/grammar/exercise4
http://www.oup.com/elt/global/products/project3rdedition/level1/unit4/grammar/exercise5
http://a4esl.org/q/h/9704/dg-wh.html
http://a4esl.org/q/h/mc-www.html
http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/presnq3.htm
http://www.esoeonline.org/main-index/index-exercises/grammarexs/elem/elemWh1.htm
http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/presnq3.htm

http://www.oup.com/elt/global/products/project3rdedition/level2/unit1/grammar/exercise4

Starters (Wh- questions- find information on the Internet): http://www.oup.com/elt/global/products/adventures/websearches/exercise1.1

videos:

• http://www.youtube.com/watch?v=ltkkfk8YWqY&feature=related 
• http://www.youtube.com/watch?v=1Ky6Z4OUrpw 
• http://www.youtube.com/watch?v=cSDbQ4unUao 
• http://www.youtube.com/watch?v=7mbKxzgpxNE&feature=related