I've had a rash of parents contacting me for help as their university kids seek either summer jobs or co-op placements.
This is a case where "one size does NOT fit all" is important to remember. My answer to one dad explains why. I've renamed his son, Jasper, for confidentiality. The suggestion of a Day Camp Team Leader builds on Jasper's past summer employment experience. Here's what I wrote:
So, you see that there's a great deal of strategy that goes into content! That's what creates an effective, influential resume that lands interviews.