ActivInspire - interactive review of the PowerPoint lesson III in Unit IX. ActivInspire programs contain multiple choice; true/false; text and numeric responses as well as many graphics and student prompts. A PDF file can be generated to use as a worksheet/study guide with this program.All PowerPoint lessons; ActivInspire reviews; student worksheets/activities and assessments can be found under the "Complete Unit IX Milky Way and Other Galaxies" zip file folder.Terms in this lesson include:gala