Suggestions for an online quiz platform

[techguy817]

I want to build an online quiz system in C# that dynamically displays questions to users when an admin releases the questions by clicking a button in the portal. Questions will appear one at a time to users in their browser (real-time) with a countdown timer and users will be awarded points based on their answer (5 points for first correct answer, 3 for second, and 1 for all others who answer correct). I have designed the database schema thus far and can connect to the tables in a Web page but I'm not sure the best controls or logic to use here. All of the C#.NET work that I've done in the past has been static Web forms and Win32. I'm thinking maybe some kind of AJAX control would work. Any suggestions, links, etc. are greatly appreciated!