Here's a list of games devised by the BBC for English kids to practice different skills. All of them can be useful for you lot. Have a go at state of debate (one of the last ones in the list):

http://www.bbc.co.uk/schools/gcsebitesize/games/

verb patterns practice.

infinitive or gerung.
to-inf vs. -ing



http://www.englishgrammarsecrets.com/ingform/exercise1.swf
http://www.eflnet.com/grammar/gerinf3.php
http://www.eflnet.com/grammar/gerinf4.php
http://ww2.college-em.qc.ca/prof/epritchard/infgerun.htm
http://ww2.college-em.qc.ca/prof/epritchard/infgeru2.htm

Spot-on games to practise your reading skills:

http://www.bbc.co.uk/skillswise/words/spelling/soundandspell/silentletters/game.shtml
http://www.bbc.co.uk/skillswise/words/spelling/recognising/homophones/game.shtml
http://www.bbc.co.uk/skillswise/words/reading/typesoftext/game.shtml
http://www.bbc.co.uk/skillswise/words/reading/summarising/game.shtml