Some of the top schools in the US offer free online courses that allow you to complete modules at your own pace and explore topics you might not be able to during your time at university! Some of these modules can be completed in a day and others over the course of several weeks with an hour or two of time commitment, but all of them provide you with expert level knowledge that you can add into the skills sections of your CV (or even your certifications but you might have to pay for that)!
Here are some of the courses I would recommend for…
Geography students:
- Systematic Approaches to Policy Design | Harvard University
- Humanitarian Response to Conflict and Disaster | Harvard University
- Global Problems of Population Growth | Open Yale Courses
- https://online.princeton.edu/making-government-work-hard-places
- https://online.princeton.edu/writing-case-studies-science-delivery
History students:
- Introduction to Digital Humanities | Harvard University
- Making the Modern World: The Industrial Revolution in Global Perspective | Science, Technology, and Society | MIT OpenCourseWare
- Early Modern England: Politics, Religion, and Society under the Tudors and Stuarts | Open Yale Courses
- https://online.princeton.edu/courses/global-history-capitalism
Environmental students:
- The Health Effects of Climate Change | Harvard University
- Energy Within Environmental Constraints | Harvard University
- Science Communication: A Practical Guide | Science, Technology, and Society | MIT OpenCourseWare
- Weather and Climate Laboratory | Earth, Atmospheric, and Planetary Sciences | MIT OpenCourseWare
- Environmental Politics and Law | Open Yale Courses