Greek and Latin Roots for 4th Grade is a fun, simple, proven method for mastering 450 Greek and Latin Roots. This system has been used in a classroom setting for over 10 years with a 99% success rate of student memorization and mastery. What is mastery? Mastery is the immediate recognition and recall of each root with the ability to correctly provide the definition from memory. This gives students a powerful way to increase vocabulary, improve reading comprehension, understand history and science, and give an added edge to learning a foreign language.