This game reinforces the proper use of grammar as players identify and correct common grammatical errors. Over 700 sentences at three levels of difficulty are included. Throughout the game there are mistakes that are commonly made in the usage of adjectives, adverbs, questions, verbs, subject verb agreement, nouns, comparisons, superlatives, gerunds, infinitives, prepositions and more. A comprehensive answer key is included. Great for all English Language Learners (ESL) low intermediate to advanced and English grades 6-12.