Cost would be negligible compared to a teacher's salary.
(1 teacher / 20 students) * ($50k / teacher-yr) = $2500 per student per year to fund teacher salary.
Compare that to $40/yr domain+hosting, which maybe 10% of students will use. $4/student-yr will not be the diffence between paying teachers probably or not.
(1 teacher / 20 students) * ($50k / teacher-yr) = $2500 per student per year to fund teacher salary.
Compare that to $40/yr domain+hosting, which maybe 10% of students will use. $4/student-yr will not be the diffence between paying teachers probably or not.