प्राथमिक भाषा अर्जन में, बच्चों के लिए साहित्य को पढ़ने का एक __________ स्रोत माना जाता है।

Before entering the classroom, a teacher asks himself, 'What changes in the behaviour of the students can I bring about through this lesson?' Such intended changes constitute the teacher's:

A class V teacher gave students a task to write a story. While students are writing, the teacher walks around the class helping those who make errors or ask for new words. Here, the teacher is playing the role of a: