Students have math class (they have a class which is called "Math") Students have a math class this semester (they have a class in the field of math and it could be algebra, geometry, math 101 or something else) They are in class now
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
MustAskwhich is better "they are in class now" or " they have class now".Both are fine in AmE.