Hey all! I'm dreaming up a system that goes something like this. It is very similiar to an Andon light used in the manufacturing world.
- Each student has a switch on their desk connected to an LED.
- When the student is working away just fine, the LED is set to green.
- When the student needs help but can continue working, the LED is set to Yellow.
- When the student needs help and can not continue, the LED is set to RED.
The trick is that I want to read the status of the lights from a "main console" which will probably be just a PC in the corner somewhere gathering data wirelessly.
My thought is that data can be compiled to show a variety of information such as: which students are doing well, which students are getting along, and which students are falling behind. Also, one could take the data and compare it across multiple years for certain lesson plans to find out which are working and which are not. Etc, Etc.
So my question to all of you is: What hardware do you think i should use to transmit the current state of each desk? I'm thining that xbee + arduino might work, but the cost of that scares me a bit. I'm wondering if a simple RF connection would work? There are about 30 kids per class, so cost is definitly an issue here.
Anyway, I'm anxious to hear what you all think.