Improve Reading Comprehension learning games for ESL learners are free online educational application that appropriate for all ages and skill levels. It totally helps expanding your background knowledge as well as vocabulary explicitly while having fun. Moreover, this free application is specially designed for both native speakers as well as students learning English as a second or third (or more) language. Kids, teenager and even adults love practicing this reading comprehension worksheets which can be one of a good educational online test. It is simply because these online books teach you about grammar, sight word vocabulary etc.