Final answer:
When you have questions about course material or homework, it's best to post on the discussion board first, for the benefit of all students. For more specific issues or personal guidance, contact a teaching assistant or professor during office hours.
Step-by-step explanation:
If you have any questions on course concepts or homework problems, the recommended first step is to post on the discussion board. This approach is beneficial because it allows not only you to receive help but also other students who might have similar questions or could benefit from the discussion. General course questions of a nature that could help others should always be shared in this manner. If your question is more specific or you need individual assistance, then reaching out to a teaching assistant or your professor during office hours is advisable.