This document discusses tools of assessment, specifically questionnaires. It defines a questionnaire as a series of questions given to individuals or groups to obtain information about a problem or aspect. There are two main types of questionnaires: closed-ended questionnaires that restrict responses, and open-ended questionnaires that allow free responses. The document outlines merits of questionnaires such as their ability to gather information from large groups, but also limitations such as potential low reliability and validity due to non-responses or misinterpretations of questions.