In the UK. In high school (age ~11 to 16) the only exams that mattered were SATs at ages 7, 11 and 14 (though I just checked and apparently they've scrapped the 14 year old ones for some reason), and GCSEs at 16. After that you have A-levels for two years (age 17 and 18) where IIRC it was just one big group of exams at the end of each year, and then university where I guess maybe it varies but at least at Cambridge it was one big group of 3-hour long exams at the end of each year.

Though Cambridge does have "tutorials" which are 1:2 tutoring sessions where you probably couldn't completely rely on AI.

Your way definitely sounds better to me.