I'm very involved with DS1, but much less so with DS2, even though he is younger. It just about what each child wants and needs.
I know about the timetable and the exam board specifications because I built the timetable spreadsheet using my excel skills. It ended up taking a lot of time, but started off as just an hour's work on Saturday last Autumn. DS didn't know where, or when, to start with the revision for the mocks, so I suggested he list out what he needed to know for the mocks and make a guess as to how long he needed to revise each part. Then add it all together and break it up into manageable chunks. 5 minutes later, it became obvious that he was hazy about recalling even the names of the topics he had been studying. He has dysgraphia, so his workbook gets used infrequently in school and his electronic notes were all in a jumble.
So, I googled the specification for each exam, and copy pasted them into a spreadsheet.
After the mocks, DS asked me to modify the spreadsheet to actually map the work onto a calendar, so I did that (took 3 days because at first, I couldn't work out how to do it so that he could keep changing it easily).
Then at easter he started to panic that he wouldn't have time to learn everything and do all the homework etc. Also, he could only see what he didn't know, rather than appreciate that he already knew a lot. So, I made more modifications, often going back to the spec to check some facts rather than relying on DS's often hazy description of what he thinks the teacher may or may not have told the class.
It turns out that the specification is really useful, but I don't know if something else would have made me look at it if I hadn't been for trying to build that spreadsheet.
I feel like I am having to justify myself here....