How can I say "bimestre" in English?

[Hopeful]

In Panama the schoool year is divided in four 2 month periods, each period is called a "bimestre". What is the English word for Spanish "bimestre"?.

[Mister Micawber]

semester

No, that's wrong.

quarter
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Native English teacher at Mister Micawber's

[Beeesneees]

In British schools the school year is divided into terms. Traditionally, there are three terms in a year, though a few areas of the country now have four-term academic years.
Many universities and other higher/further education establishments have adopted the American system of semesters instead of terms.
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Cheers m' dears!