Think of this section like a resume, but without any super-critical or revealing pieces of information. Just put the year you started working at that company, the position title and duration [full or part time], required experience, and a brief desription of what you did. You may also want to put a logo of the company [if that is allowed], and a link to their website, if you want. A breif description of why you chose each job may also be written, for it would provide a quick explanation if there was any confusing parts.
My general work history is the following: