It depends a bit on what you want them to write code in. R Shiny has some built in e-learning functionality with interactive documents. At least two packages wi

It depends a bit on what you want them to write code in. R Shiny has some built in e-learning functionality with interactive documents. At least two packages will let you-develop e-learning materials. If you use Python Jupyter notebooks have a an ability to be graded which would allow grading of code. I would then recommend Piazza for cimmunication with students as it supports code formatting and math in the form of LaTeX support.