.answer:
1) como es la clase espanol?, means, how is the class of spanish
2) como son los alumnos en la clase de espanol?, means, how are the students in spanish class.
3) quien es el/la profesor(a) de espanol?, means, who is the teacher of spanish?
4) de donde es el/la profesor(a)?, means/ where is the teacher from?
explanation:
because i am not you! i cannot answer your questions since i do not have spanish class with you, and i do not know who are the students, and who is the profersor of your spanish class. but if you need help with wording it just ask me!