This program meets Common Core 4th grade language standards as it introduces and explores how to form and use progressive verbs. What is a verb? What is a participle? What are the spelling rules for forming a participle? What are the progressive verb tenses? How do I form the present, past and future progressive tenses? The answers to all of these questions are covered with detailed graphics, diagrams and exciting video, as well as on-screen, multiple-choice reviews at the end of each segment that reinforce important concepts and make learning fun.