Penn State is offering an online course (MOOC) called Maps and the Geospatial Revolution. It's mostly an intro to map making but might be a good refresher for anyone.
https://www.class-central.com/mooc/676/coursera-maps-and-the-geospatial-revolution?utm_source=cc_mooc_report&utm_medium=web&utm_campaign=coursera_completely_free_courses