"study in class" is correct and usable in written English.
You can use it when you want to refer to studying in the classroom as part of a lesson. For example, "My teacher told us to study in class for our upcoming test."
The 1981 air-traffic-controller strike was, among other things, a case study in class ambition.
In this study, in class II patients, a statistically significant decrease in the ANB angle was obtained during treatment as a result of a statistically significant increase in the SNB angle.
Come Dine with Me is a curious state, devoid of politics (there are never political arguments) or racism or sexism, but dwelling somehow in its smoke, a study in class. .
Lorde collected song of the year honors for "Royals," a pointed study in class consciousness she and songwriting partner Joel Little wrote just to see if they could attract anyone's attention.
However, when they will study in Class Nine-Ten, they can learn more details about HIV/AIDS.
Although panels focus specifically on experimental systems under study in class, they likely help students develop a more generalized skill in experimental design and creative thinking.
Political institutions that were supposed to reconcile a divided society are ineffective; ethnic quotas at all levels of government breed nepotism; children study in classes divided according to their parentage; economic development has stagnated.
Students may choose from among countries previously studied in class.
And that became a case that we studied in class".
I'm looking forward to homework and studying in class.
When interviewing your subjects, draw on the research questions you studied in class.
