> There's no way to organize the current amount of hours in which you have "small groups" for 5 hours a day, unless small is 30 students per one teacher, in which case we're already doing that.

The proposal was 5 hours a week not 5 hours a day, IIUC. Likely you'd still be looking at rather large small groups and/or a substantial increase in teacher-hours per pupil, though.