Oxidation-Reduction Worksheet Half Reactions Practice. A worksheet, in the term’s original meaning, is a sheet of paper on which one performs work. This is a printed page a child completes with a writing tool. No other materials are needed. It’s”a sheet of paper on which workouts, working time, special instructions, etc. are recorded. A bit or scrap of paper about which problems, ideas, or so on, are put down in tentative form.” In education, a worksheet could have concerns for pupils and places to document responses. In accounting, a worksheet is, or was, a sheet of paper with columns and rows on which an accountant may record data or perform calculations.