It's a good tool. Just not teacher friendly now.
How I Use It
They have gotten rid of the Class Code option for students to join your Gizmo Classes. It is labor intensive to create your classes now. You have to add each individual student or upload a csv file. Both options are much more complicated and the teacher has to do it instead of the students doing it for themselves. I will not use the site because of this. I have enough to do.