I am looking for an installable code playground, possibly for HTML, CSS and Javascript.
I am a computer science professor and in one of my courses I teach basic HTML, CSS and some Javascript. I would like to introduce my students to code playgrounds such as jsfiddle or jsbin. Additionally, I would like to deliver final exams through a similar tool, so that we replace tests written on paper with tests performed, self-assessed and refined on a browser-based tool.
The problem is that I do not want to let students access the Internet during the exam, and look for existing answers online or even establish communication channels among themselves or with experts at home, so I need to isolate the lab from Internet during the exams.
This means that I need to install a local copy of the playground tool on one of my servers. Do you know of any tool that provides their code (free or commercially, not relevant) for a local installation?
I don't need anything fancy, no automatic includes, no libraries, nothing special, just the possibility to install something on my server that runs without Internet dependencies.
Thanks in advance for your suggestions.