'excused from school' is correct and usable in written English.
You can use it when you are referring to a situation in which a student was granted permission not to come to school or to leave school early. For example: "The principal excused Dave from school early so he could attend an important family event."
They also sign notes saying children are sick and should be excused from school or P.E.
Philip had to be excused from school and brought with him several textbooks in which he might hide from his mother.
Before long, she was singing with the choir at concerts and operas all over Russia and Europe, requiring at times that she be excused from school.
This would have been my story, as well — I was sixteen then — but on that Friday morning I was excused from school early for a doctor's appointment.
And also, more germanely, the 14- and 15-year-olds who had apparently been excused from school to attend a noon showing at the local multiplex.
Every Tuesday and Wednesday I was excused from school and reported to the same fields and the same coaches that reared my City heroes: Shaun Wright-Phillips, Stephen Ireland, Micah Richards and Joey Barton.
Thousands of the state's students were excused from mandatory school attendance during the 2010-11 school year due to religious exemptions, according to a study by the Child Advocacy Clinic at the University of Virginia law school.
[n13] This, the schools should "release". Accordingly, the Federation, citing the example of the Third Republic of France, [n14] urged that, upon the request of their parents, [p223] children be excused from public school on Wednesday afternoon, so that the churches could provide "Sunday school on Wednesday". This was to be carried out on church premises under church authority.
Father Eichner denied that Megan was excused from any school activities except the receiving of sacraments.
Several students from a local high school had been excused from class to attend Friday prayers, school officials said in a statement.
The Australian-born Dr. Fred Schwarz established a school of anti-Communism that attracted thousands of local students (many excused from regular classes by their school boards).
