From the site - "The courses are designed so teachers can apply what they've learned immediately to the classroom. In addition, each course is designed to be completed in 90 minutes or less so teachers can stay focused on learning one topic at a time."
Some courses are FREE others are at a pretty low cost.
Great wiki featuring loads of free technology tools that offer opportunities for struggling learners that promote academic successU though Universal Design for Learning
HotChalk is a learning environment for K-12 teachers, students and parents that includes a learning management system (LMS), a rich library of teacher-contributed lesson plans, premium digital content like NBC News video, and professional development for teachers in a Web-based environment. Available through any Internet browser, the HotChalk Learning Environment is an easy to use system and brings teachers, students and parents together to improve education.