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Physics videos are colour-coded into three broad areas intermediate (yellow), advanced (blue) and university (green).
The areas have some overlap. Countries vary with the systems they operate and the exams they set.
Approx. appropriate ages of students are shown for the degree of difficulty of the areas.
13 yrs. < intermediate < 17 yrs.
16 yrs. < advanced < 20 yrs.
19 yrs. < university < 25 yrs.
Of course this is just a guide to help students where to start. For the Public at large, please feel free to dip in and out of any topic that interests you