When we recently did a training for our A'o Makau instructors and thought of them when I was testing out this tool. However, I will say that Engrade.com has been an excellent resource for classroom teachers. You can manage your class in a real-time environment and students, parents, as well as administrators can all look at what is happening.
As a teacher you can create your class website, assignment calendar, online messaging that is secure, attendance and grades.
Last but not least - IT'S FREE!