Is the meaning of "class" the same as that of "course" and "class" in taxation, "encouraging classes to cultivate farmers" and "team leader"? Still related?

These words have different meanings, as follows:

[Tax] It was called tax in ancient times, also called "tax".

Encourage supervisors to engage in agricultural production. Attend classes, supervise and persuade.

[Head] subject manager. Classroom, science.

[Course] To arrange chapters in a planned way. Class, subsection teaching.

[class] study subjects. Classes, teaching subjects or planned subsection teaching.