Kids need time to be kids. They need to explore and play. They need time to be with their families. Would you enjoy a 12 hour work day, 7 days a week?
Children are not miniature adults. They have vastly different needs.
Just an observation.....
We started HS'ing two children in around 1988.....Our oldest was maybe 5-6 learning to read..and the younger one was 3-4..and sitting there soaking it all up...and would recognize words and phrases faster than her sister. It frustrated our oldest daughter...and to my wife's credit she...shut down reading for our older girl. She just was NOT ready at that time....
Cranked it back up a yr or so later...and lo and behold, it just clicked for her then.
The point is...all kids don't learn the same, some things are pushed to fast.
They both ended up being wonderful comprehensive reader's...and are now both successful young adults.
Best to you........