I quite agree with you, I would like to see that kind of education system. However, what would the Teachers think about it.
I think I know, unfortunately.
No-one is disputing that the vast majority of Teachers and their assistants do a fantastic and at times difficult job. Given the lack of discipline and the way in which current thinking has tied their hands in the majority of issues facing them I think they should be commended more often.
However, that doesn't change the fact that reducing the holiday entitlement to 12 weeks instead of 13 to accommodate the training days is not too onerous a request.
TBH I don't think it should be 'teachers' doing the afternoon stuff. Pay the teachers whatever for their morning o work, which is similar hours to they do now, then employ a stack of trained professionals to do the afternoon work.
If a teacher wants to doble job let them, but it should be treated as a second job.
PE teachers, they work the afternoon shifts with various groups, same for music, same for whatever else fills the spaces. Its about overall education, and a trained physics teacher isn't trained to teach extra-cirruluar activities at present, so shouldn't be doing it unless he retrains.
It would be one way of using public funds to create a more rounded society, and I actually think that kids who are taugher from am to lunchtime, then exercised, or trained, or 'experienced' for their afternoon, to5pm or 6pm, will be shattered (but in a good way) and will lead to less public incidents, higher attendances and overall it'll make the kids watch less TV in the evenings as they will go to bed earlier, rise with sun bed with dusk, as is done in the half of the world who live near the equator.
The kids shouldn't be watching skins, they certainly shouldn't be living their lives like a cast member. My ideas would have course cost money, but it would employ people, and generate a better society, and over time I think that would pay off.