This document discusses using multimedia and online collaboration for formative assessment. It explains that formative assessment is used to engage student preconceptions and gauge understanding, while summative assessment evaluates learning. The document provides examples of using pictures and videos to elicit student explanations for real-world phenomena as a form of formative assessment. It also presents a scenario asking students to choose the best description for what happened to water that was in a drying apron and explain their thinking. The purpose is to engage students in applying their knowledge to everyday examples.