Instructors with heavy accents.

Anyone struggle with understanding their instructors? My first foray into the struggle was when my vector calculus class was taught by professor from Poland where English was her 4th language. Last semester my thermodynamics was taught by a professor from India. He wasn't too difficult to understand. But this semester, I have two classes with an instructor from Nigeria. Lordy...lecture is something else. Listening this intently is something else.