Hey everybody, I'm new here

I would like to inquire what do they mean by 'coursework' in the SAM programme. The coursework is stretched throughout the whole year or there are specific dates that one has to hand in their assignments and then given another new one.
Can someone please help to elaborate it and if you have other information about how the SAM programme goes about, do let me know.

It would be advisable to opt for SAM or Cambridge A-Levels?
Besides the difference on the exam style (the former which has coursework while the latter doesn't as it is fully exam based) what other benefits and differences does both the courses have?