quarterly
The Spanish term 'materia trimestral' translates to 'quarterly subject' in English. It is generally used in academic circumstances, referring to a course or subject that is taught over a three-month, or quarterly, period. This term is typically used in schooling systems that divide the academic year into four quarters.
The quarterly subject of mathematics is very interesting.
This phrase indicates that the subject matter of mathematics for the trimester is engaging.
I must study the quarterly subject of history for the exam.
In this sentence, the speaker is expressing the need to prepare for an exam in the history course that spans the trimester.
The teacher explained the quarterly subject of science clearly.
Here, the phrase emphasizes that the teacher provided a clear explanation of the science content covered in the trimester.