English games. Comparatives

http://www.eslgamesplus.com/comparativessuperlatives-esl-grammar-nature-world-geography-vocabulary-fun-game/

Regular and irregular verbs game

http://eslgamesworld.com/members/games/grammar/New_Snakes_%20Ladders/Past_simple_tense.html

http://www.eslgamesplus.com/past-simple-irregular-verbs-esl-grammar-interactive-activity-online/

comparatives and superlatives

Do you know USA?

Rivers and Lakes
http://serbal.pntic.mec.es/ealg0027/amerinorios1i.html

Mississippi River
Missouri River