R is an open source programming language and for statistical computing and graphics that consists of a command line interface, while R Studio is an integrated development environment used to programme in the R language. If you're new to R and R Studio, it's best to learn a little bit about the R language first, before moving on to programming in R Studio.
R and R Studio can be installed on staff and student machines by visiting AppsAnywhere. R can also be downloaded for free from the R Project website and R Studio can be downloaded for free from the R Studio website.