I have often used whiteboards teaching math. I write questions on the board, and students answer them on small whiteboards, showing me their answers. I record their progress on a chart, and help them with questions that they don’t understand. This worked well in Special Education classes, with five to fifteen students, but I am not sure that it would work with thirty or more. The recording progress would take all my time, and I would not be able to help many students.
If I were to do the same thing using Google Forms, the form would track the students’ progress, and I could monitor the sheet to help students who were getting answers wrong and students who asked for help. The response sheets also are automatic documentation of student work.