learnr packages are for creating R tutorials with shiny apps running under the hood. Normally, running them require you to run a server or purchase shiny apps hosting service.
However, Binder service can provide an alternative. Following are two examples of learnr tutorials running on Binder.
shiny/test1:
shiny/test2:
The Binder image has Jupyter notebook with R and RStudio installed. Rstudio can be invoked to develop and troubleshoot tutorials. Following Binder links will show you how to get to these endpoints
R + Jupyter notebook:
RStudio: