This is the 15182nd most frequent German word.
testet
"Testet" means "tests" (third person singular present tense of "testen").
Here, 'testet' is used as a verb meaning 'to test' and describes the teacher administering a test.
Der Lehrer testet die Schüler heute im Mathematikunterricht.
The teacher tests the students in mathematics class today.
In this sentence, 'testet' emphasizes the act of trying or experimenting with something new to see its outcome or efficiency.
Er testet ein neues Rezept in seiner Küche.
He is testing a new recipe in his kitchen.
'Testet' here refers to scientifically evaluating a hypothesis to verify its validity using experiments.