[benignslime]

Absolutely. After pondering over this website myself for 20 minutes, I felt similarly to OP regarding the long slog through elementary and secondary schooling to finally feel like there was "progress". It's clear filtering by grades in the sheets, the tempo of the exercises is painfully slow. I remember as a kindergartner being able to produce and memorize multiplication tables after being taught the process. It took at least 3 to 4 more years until school ever began expect it.

The thing is many of these concepts and ideas and facts _are_ simple and straightforward. In seventh grade I literally stopped doing my work altogether, and was offered by the teaching staff to move onward to eighth grade instead. I felt then that I still understand now, that forcing yourself through the paces is important too. If I skipped a grade who knows what little things I may have missed.

It's like lifting weights, you're better off being gradual about your increases and pushing your rep counts -- instead of doing two reps of something you shouldn't even be attempting.

The truth is any good teacher and school would be able to provide projects and exercises that would help apply the types of rote work the sheets present. Even if you only ever did the sheets on the site, it'd still take some kids the whole year to get through them. If teachers are creative enough, there should be enough flexibility to cater to both student types.