Conocer means to know [a person], or to recognize [something].
Saber means to know or to have the knowledge of [something].
Example:
Él la conoce. - "He knows her." or Yo conozco el carro. - "I recognize the car."
Ella sabe dónde está, - "She knows where it is."
You're talking about knowing which classes you have.
Sabes quales clases tienes.
Answer:
Saber
