The SAL Portal & Blog
If it has been a while, you feel a bit rusty, or your data is playing up, it is worth reviewing some online training from esri to see if there are any helpful hints, tips, or ways of using the software you didn’t know about/remember.
Start Here if you are getting started or starting again
Map Projections and Coordinate Systems
Doing Stuff
A SAL registered project or enrollment in a subject in which your course coordinator has arranged access is required for access to the Esri Virtual Campus, you will know if you are in one of these groups 🙂