I want to use the ck12 material for my Biology class, but I want to platform it on Buzz. What I would like to do is put in the web link in the assignment creation dialogue and have it just open up when a student clicks on the assignment. It works fine from my teacher preview screen, but from the student side it gives a message "flexbooks.ck12.org refused to connect." Is there a way to fix this? Is an issue on the ck12 side? Thanks.