"to attend class" is correct and commonly used in written English.
Example: The students are required to attend class every day in order to receive full credit.
Students suffering from migraine reported on average about 10 days with severe restrictions in school attendance in the last three months (absent days or >50 % restricted abilities to attend class).
Because attendance was not mandatory, many students, especially nonbiology majors, preferred not to attend class at all.
Nobody was required to attend class.
But students have to travel out of town to attend class".
This may delight undergraduates who do not have to change out of pajamas to "attend" class.
But Rodwin's medical emergencies make it difficult for her to attend class regularly.
It is extremely hard for somebody who is using crutches or a wheelchair to attend class.
This is the Ivy League, after all, where even the athletes are known to attend class.
Teams now schedule weekday games to accommodate cable television networks at the expense of their athletes' ability to attend class.
But the teachers allow them to attend class anyway, because they are brilliant students who earn top grades.
Those who are medically exempt, for reasons like being allergic to a shot, will be allowed to attend class.
