T4L - for K-8th. We have used it for the past 2 yrs as a spine for 1 and single course (Math) or jump around review for the others. I am a veteran with 5 (3 are now done) I wish this had been around earlier. It is based on the Learning Odyssey. It is a fabulous value for the $. The lessons are engaging (try out the samples on site), and the kids have enjoyed completing the activity bubbles and having their tests scored immediately. They can work totally independently. Lower grades have Peedy the Parrot which will read out loud what is on the screen. You can also set a timer and after so much work they can go to the playground - very motivating. I liked having the record keeping done for me, showing how much time they spend on each subject, activity, quizzes etc. that I could print out however I liked. The resources for offline work such as in language arts contain many pages that can be done as a unit study over several days if you wish. It can be structured or used flexibly with other curr. The lesson plans are detailed so you can pick and choose subject, grade level and activity at any time.