List the jobs you've held in reverse chronological order, beginning with the most recent. Do the same for schools and degrees in your education section. Include dates and locations. For jobs, include appropriate contact information. If something needs to be explained, do it in a follow-up interview.
Employers do check, and people who make false claims get fired.
Y our cover letter introduces you to prospective employers. Use it to show that you know something about this company and really want to work there. Customize each cover letter. It's good to state your professional objectives, but emphasize skills and experiences the employer can use, not your own interests. G et some good books.