The phrase "absent from classes" is correct and can be used in written English.
This phrase can be used when you would like to indicate that someone has not attended a class. For example, "John was absent from classes last week due to illness."
Absent from class: Rob Ford is Toronto's outsize mayor – in more ways than one.
An independent review released in June concluded the Halifax regional school board could have done a better job but was hindered by the fact that Rehtaeh was often absent from class.
Students, particularly outside the Russell Group universities, are often exhausted or absent from class owing to the multiple jobs they have to take on in order to pay rent and buy food.
Students who are taught by an "other-race" teacher are significantly more likely to be absent from class and suspended when compared with students who are assigned a same-race teacher, therefore resulting in lower academic achievement, according to a recent study.
Students rarely study 14 weeks and they most often tend to be absent from class even though there is a compulsory attendance policy.
Another student interviewed in the second semester, Yoichi, stated that attendance had been a problem in the second semester, and being absent from class had negatively impacted his feelings of efficacy.
It might happen that after attending the classroom lecture, the students still have some questions in mind which they want to clarify by collaborating with their peers, or they were absent from class due to a medical issue or traveling purpose.
Only eight Franklin students were absent from class.
Only one in five of Uganda's primary school teachers meets the minimum standards of proficiency in numeracy, literacy and pedagogy, and about two out of four teachers are absent from class daily.
