If you are an intermediate or advanced learner, the Grammar Cubes Puzzle book offers you:  Clear grammar explanations and rules.  10 cubes to solve for each Grammar Learning Objective.  Empty cube boards to make up new ones for each grammar learn ing objective.  Sentences to build and comprehend.  Vocabulary enrichment opportunities.  Answer sheet at the end of the book.  If you are an English teacher, then this book offers you the opportunity to incorporate the grammar cubes to curriculu m objectives to assess students´learning.  Develop cooperative group work.  Better your sentence building, writing and public speaking skills.