Worksheet, in the word’s genuine meaning, is a scrap of paper on which one performs work. They come in many kind shapes, most ussually associated with kid’s school work assignments, tax forms, and accounting or another business environments. Software is increasingly taking over the paper-based worksheet.
It could be a published page that a child finishes with a writing instrument. No materials are needed. It’s “a sheet of paper on which schedules activity, working time, special guides, etc. are noted. A piece of paper on which issues, ideas, or the like, are set down in tentative form.” In school, a worksheet may have questions for students also places to write answers.
In accounting, a worksheet is, or was, a scrap of ruled paper with rows and columns on which an accountant could register information or do calculations. These are oftentimes named columnar pads, also typically green-tinted.
In computing, spreadsheet software presents, on a PC monitor, a UI that like one or more paper accounting worksheets. MS Excel, a favorite spreadsheet software, refers to a single spreadsheet (more technically, a 2 dimensional matrix or array) as a worksheet, or it refers to a group of worksheets as a workbook.