Delegate appropriately. This is something that some nurses get wrong. They choose to be BOSSY by delegating as much as possible, over being a LEADER, by delegating when it's the BEST choice. Or, they underdelegate, and make poor prioritizing decisions that effects their work. The point is to make things efficient. If you are not getting important nurse things done, that is not efficient, and your CNA is a wasted resource. However, if you are doling out a workload that slows the CNA down while you get on the phone or work super slowly, that is also in efficient, as you are the wasted resource.
Understand what the CNA expects you to delegate. Most of the time, it's routine and they should already be doing it. The rest of the time, you must make a judgement call. Do I have important things to do that must be done that only I can do? Delegate. Do I have some time time to do this myself, and my CNA is really loaded? Probably do it yourself, or work together.
It is up to nurses to have good time management. Working slower than other nurses are expected to when you are on the job is no excuse to overdelegate. However, as a student, you need that extra time because you are learning and practicing skills. You also need to know what you can delegate. So I would lean toward the delegation, and be confident when you delegate that you are making the right decision and not being bossy when you say it. If you do not say it with confidence, CNAs might actually question whether the task needed delegating. This is how I felt as a CNA when people asked me to do things in an unsure matter.