In the next links you can find more activities, information and games to improve your classes and lesssons.
Hope this help you!
Brief summary
http://www.englisch-hilfen.de/en/grammar/sim_pres.htm
readings
http://www.jumpstart.com/parents/worksheets/reading-worksheets
Listening
http://learnenglishkids.britishcouncil.org/en/listen-and-watch
Games
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