http://www.englishexercises.org/buscador/buscar.asp?nivel=any&age=0&tipo=any&contents=present+continuous#thetop


http://www.englishmedialab.com/GrammarGames/fling%20the%20teacher/actionverbs/present%20progressive%20multiple%20choice.html


http://www.englishmedialab.com/GrammarGames/present%20tenses/present%20progressive%20hangman.html