The verbs and subjects must agree and the grammar ought to be correct. Writing the resume with impact statements and simple sentence structure will make reading easier, and interesting. Using action verbs instead of the following will give the employer a better idea of the activities performed. I did the paper work. Use words that show exactly what the job entailed.
Many readers favor bulleted lists.
Short phrases are easier and faster to read than long paragraphs. Busy readers can skim for points that interest them. Don't pad your resume with every single club you've ever joined. The resume should be no more than two pages long. For an entry-level position, most employers favor one page.