Today's students, almost all of them, have a very poor vocabulary. The great treasure of our language remains untapped. This treasure comes to give our children this aid and teach them to use it correctly in their everyday speech. Following chapter by chapter the Language textbook series of the 1st grade (volumes 1-2), it analyzes simply and comprehensibly all the grammatical phenomena presented in each one of them, and then provides a series of various exercises in grammar, spelling, syntax, vocabulary, and semantics for their understanding and consolidation. By completing these exercises, students cultivate, upgrade, and enrich their vocabulary in the most efficient way. These exercises can be done both at school and at home. At the end of each unit, there is a self-assessment test for the student's "feedback".