What is an informal assessment based on?

Informal assessments are primarily based on the teacher's spontaneous daily observations. This type of assessment is not structured or standardized but rather relies on the teacher's ability to gather insights about students' learning and behavior in real-time situations. By observing students during activities, discussions, or interactions, educators can gain valuable information about their understanding, skill levels, and engagement.

This method is advantageous for its flexibility and immediacy, allowing teachers to adapt their instruction based on what they observe on a daily basis. It provides a holistic view of students' capabilities, capturing nuances that formal assessments might miss. The other options revolve around more structured or formalized approaches; thus, they do not align with the informal nature of this type of assessment.