GIS is no longer the ‘future’ of geography, it is the now. Browsing through Linkedin jobs, it is clear that any single job related to geography makes it a baseline requirement that the applicant have experience with GIS.
Click the link for an online, free training with the world-renowned GIS company, ESRI. It is a great introduction to the mechanics and usefulness of GIS. It is a course that is helpful for students and teachers alike, and at the end you get a certificate (PD hours!). You will need to make a (free) account.