¿Cómo podemos ayudar?

chen.adora.z

Actividad reciente de chen.adora.z

do I do the course challenge at the beginning or end of finishing a course?
1. Comunidad
2. General Khan Academy Questions
When I first opened the math course for my grade the option to do a course challenge popped up. Since it appeared I thought it was like a revision quiz of things you should know going into the cour...