Contextual Redefinition (Stop and Jot) for Science is a strategy that helps students learn important new scientific vocabulary. Integrated as a focusing activity in a science lesson, students are given opportunities to reflect on language and build personalised definitions for important scientific terms. As the lesson progresses, students engage in defining the target words multiple times through writing and discussion. This highly active and interactive process helps them to come to "know" scientific terms more deeply and allows for the exploration and clarification of any misconceptions they may have. Learning vocabulary in context in this way engages learners in learning new words and teaches word learning stratgies that are useful beyond the scope of a single lesson. You can use this practice as an effective alternative to having students look up words or copy definitions.