Why does the middle school teacher use a K-W-L activity before introducing a new concept?

Using a K-W-L activity—where students list what they already Know, what they Want to learn, and what they have Learned—serves several educational purposes, but primarily, it helps establish a baseline for students' existing knowledge, which is crucial when introducing a new concept. This method allows the teacher to gauge students' prior knowledge, which can inform instruction and clarify any misconceptions before delving into new material.

Identifying what students already know helps the teacher tailor lessons more effectively, ensuring that students are not reintroduced to concepts they have already mastered while also identifying areas where additional support may be needed. Furthermore, it cultivates a sense of ownership among students regarding their learning by involving them in the planning process, highlighting their interests and gaps in understanding, which enhances engagement and motivation.

This process of assessing prior knowledge is an important part of effective lesson planning, as it aligns with differentiated instruction principles, enabling the teacher to meet students at their current level of understanding and to plan more effective instruction moving forward.