Yes, the first chapter in Ozaria, Chapter 1: The Sky Mountain, is free and does not require student licenses. It takes 1-2 hours depending on your students' ages and prior coding experience. The included lesson slides lets you extend your students' experience further and can take up to 10 class sessions*, using unplugged activities and exploration projects. There is no limit to the amount of students who can join a class and try the first chapter of Ozaria free.
*We approximate one class session as a standard 50 minute class. You can also find more time estimates in the Curriculum Guide section of your Teacher Dashboard.