My searches on these sites led to other searches until I landed on cK-12. I started examining the courses and perusing the "flexbooks." As I scanned through the subject headings, displayed in an attractive well organized layout, I noticed that most of the subjects seemed to be targeted to the 12 end of the k-12 spectrum. Further investigation showed that was true, with most of the content being appropriate for upper grades.
I decided to try out one of the "flexbooks" and chose and advanced statistics course. It had excellent information and was infused with videos, online sources and opportunities to practice the skills. I could not easily find the answers to the exercises, and even when I identified myself as a teacher, I still could not find the answers.
When thought about using this source for students with disabilities, I thought of how some of my former students would have benefited greatly from the higher level content in the mathematical areas that were offered, and how some of my other students would have enjoyed investigations their special interest areas through these "flex books." I thought of the advantage it would have been to have this information at their fingertips when attempting to complete homework, and how I could have used it to provide extra practice for areas of need.
The mission of cK-12 is to provide free high-quality texts in a collaborative online platform, and think they are off to a great start. The "flex books" are easy to read, easy to download and easy to share. I think ck-12 has a good thing going and aside from needing to build more "flex books" in each area, work on providing content in the lower grade levels and providing answer keys to exercises - I can recommend this site, particularly for students in the upper grade levels.
