Please don't think I am being snippy, lovely people, but why is there such a desire for bridging work? Is it just to keep your DCs ticking over with work (fair enough), to keep them occupied (also fair enough) or is it an anxiety that you think somehow they are missing out on what is normal? Because it really isn't. Many schools give a very small amount of bridging work in some, but not all subjects, after induction days in July. At the moment , my DH is worried (fee paying school) because he is having to deliver maths A Level ridging work to year 1s (fee justification I guess) and he thinks they are going to have to reconstruct the first four weeks of their A Level course as a result, and that will definitely a) be a pain and b) create a gulf between students who have enthusiastically attended and learn remotely and those who have not , or not been able to.
To be honest, I like my subject to remain a bit of a mirage in the distance : a promise of new learning and enlightenment come September and , therefore, have always resisted reams of (sometimes off putting !) work. In fact, I do know: shhh!, that some subjects set really hard work to try to put some students off!
I think reading, watching some documentaries (happy to recommend some that are better than Netflix fare), stepping away from the screen from time to time, listening to music, playing board games , learning to cook, or knit, playing music, zooming loved ones (should your family be less Luddite than mine!) are all character developing and DCs could learn great things.
My DS has watched a few suggested history documentaries but they are actually on GCSE topics so not really bridging work. I have watched two Spanish films with him. Otherwise , he is lolloping. He does have good boredom threshold, to be fair, but I am allowing him to lollop. Life is too stressful.
Please don't be pissed off with teachers oblomov if you are : you are raging against the wrong machine there. If you looked at a few staffroom posts you would see how much angst the grading is giving teachers but also how seriously they are taking the whole process. At my own school, I can see the grades and they are definitely erring on the generous side. Don't forget any downward shift may not be the teachers : it could be the exam boards.