One of my former teachers has a very predictable weekly routine. Lecture on Monday-Wednesday, homework help on Thursday, and quiz on Friday. When the students are finished with the quizzes, they are immediately graded after shuffling them around.
The problem is that my teacher has to constantly ask whether the class is done or not. Sometimes though, a lot of time can be lost between the time the last person finishes and the next time he asks the class. “There needs to be a better mechanism for letting me know when the class is done,” he said.
I’m thinking that building this mechanism would be pretty easy. All I would need to do is create around 40 wireless buttons that students can press to signal that they are done. Ideally each one would have some kind of ID so as to not count it twice in one sitting, but it is not really necessary. I don’t really know the cheapest way to build 40 of these things though.
I’m guessing each one would have to have:
- a button
- a wireless transmitter (cheap radio transmitter?)
- a battery holder
At the instructor station I could have an Arduino with a wireless receiver and any kind of monitoring equipment. Could anyone help in choosing some cheap components/protocols?