You have to keep anecdotal records of the learning process of the students of your class. For this, you need to use :

The correct option is Observation technique.

An anecdotal record is a detailed, narrative description of a specific event or behavior of a student. It serves as a direct, objective recording of what a student says or does in a specific context over time, helping educators monitor and understand their learning process, social interactions, and developmental milestones.

To create these records, teachers must watch students closely and objectively during daily classroom activities, peer interactions, and independent work. Therefore, the observation technique is the essential tool required to gather the raw, authentic behavioral data needed to write accurate anecdotal records. Let us look at why other techniques are less suitable:
1. Project technique: Mainly used to assess a student's ability to apply knowledge, collaborate, and create a final product, rather than to keep running notes of spontaneous behaviors.
2. Oral technique: Useful for testing verbal communication, vocabulary, and immediate understanding, but not for capturing ongoing behavioral and learning patterns.
3. Assignment technique: Designed to evaluate individual learning outcomes on specific tasks or homework, which does not capture the organic, day-to-day behavioral events that anecdotal records document.