The phrase "a required subject" is correct and usable in written English.
It can be used in educational contexts to refer to a subject that students must take as part of their curriculum.
Example: "Mathematics is a required subject for all students in the science program."
Alternatives: "mandatory subject" or "compulsory subject".
The constitution of 2000 guaranteed equal status for Swedish, which remains an official language of the country and a required subject in Finnish schools.
Students can take 3.034 as a required subject or 3.034A as a restricted elective, but cannot count both subjects toward their major.
Jennifer, who is fluent in Cantonese, English and Mandarin, China's national dialect, which is now a required subject in local schools, believes there are really only two camps among young Hong Kong people like herself.
She worries, for example, that the Holocaust, a required subject in many school systems, is reduced to a collection of historical factoids rather than a lesson in the warped values of the Nazis or the moral valor of Christians who risked their lives to save Jews.
By the time I was confronted with algebra in eighth grade, math became less of a required subject we were forced to master, and more of a bridge between our two worlds, and between my Chinese home life and outside American life.
Previously, they had studied English as a required subject at school for seven years and were tested on listening at least twice a year.
Scrivener was a champion of the bar's so-called and often breached "cab-rank" rule in which a barrister is required, subject to availability, to take on any case, however unpopular the defendant or party might be.
The experiment reported here adopted a design that required subjects to process identical visual stimuli while performing different tasks: an action perception task, and two 'linguistic' tasks, a phonological task and a conceptual task.
Additionally, the problems that did not include a Gap condition required subjects to attend to the edge of the sheet.
Our task was a modified Sternberg Item Recognition Paradigm that required subjects to memorize a list of alphabetic letters (consonants only), maintain them in memory for several seconds, and then recognize whether probe letters were members of this list.
When a steady contraction was required, subjects squeezed the levers of an auxotonic precision grip manipulandum (Riddle and Baker, 2005) between finger and thumb.
