The Class Server software development kit (SDK) documents the Class Server application programming interface (API) and the Learning Resource content format. Sample code, utilities, and reference documentation are included to help you get started. 

The Class Server API allows programmatic access to Class Server functionality, such as importing and exporting Class Server data or customizing the Class Server user interface. The Learning Resource format is a flexible content specification that is compliant with content standards, such as IMS. The format also offers extended capabilities, like autogradable questions and curriculum standards alignment. 
The Class Server SDK also includesLearningResourceEditor.hta, a Learning Resource Editor add-in application designed to make it simpler for publishers and authors to use the Learning Resource Editor in Class Server - Teacher. This add-in application allows you to run the Learning Resource Editor without configuring Class Server. LearningResourceEditor.hta can be used for creating Learning Resources or as a format converter between the supported formats. This application does not require installation, and it can be run interactively or from the command line. Type LearningResourceEditor.hta /? at a command prompt to get a list of options.