Here is an excerpt from the site "Within Head of the Class you will find thousands of pages of instruction, hundreds of videos, hundreds of multimedia presentations, thousands of worksheets, as well as application programs which target learner success."
New Free Homeschool Curriculum, Head of the Class
I kinda hate how new curriculums only cover K-2 or so... But that's only because I have high school students and would like to get in on the action too. With that said, I haven't tried Head of the Class out, and it is brand new. As of right now, you will get Preschool, Kindergarten, First Grade, and Second Grade... I am assuming they will be adding more grades as they grow.