I agree about not being productive all the time - but there’s no shortage of TV time, so the kid’s not hard done by.
With regards to academics, this is also a good point - hence the “no courses for credit during summer” quasi-rule in place. The school year is enough.
However, my kid is not a fast reader, and tends to gloss over/miss things. Diving into the textbooks a bit over the summer is to prevent a sense of being completely overwhelmed come September.
I don’t know what student-approved resources are out there to help with better reading skills and retention. Anything coming from me is deemed irrelevant due to familial bond. It’s not something the public school covers.