I'm looking to develop a web based app that can be accessed from any internet connected device and used as a response system for classroom assessments. I want it to do simple things like true/false, multiple choice, likert scale, and free response. I would like to have students log into a specific numbered classroom so others can not log into that classroom. I need it to be very similar to response systems that are already available such as;

http://www.socrative.com

http://www.infuselearning.com

Let me know what you guys think. I have no idea where to start or how this could be created. Thanks.