There are three different levels of teaching and teaching takes place at three levels progressively- memory level of teaching, understanding level of teaching, and reflective level of teaching. Teachers must keep in mind the developmental stage of the learners so that desired educational objectives can be achieved.
There are three levels of teaching effectively:
1. Memory level: At the memory level of teaching, the teaching-learning process is just a stimulus-response based on memorization. The stimulus, i.e. the subject is grasped. It is then memorized by rote learning. The response is the memorized content.
- It involves memorizing factual information.
- It is the least thoughtful method since it encourages rote memorization.
- The teacher focuses on the recall, recognition, and retention of learning.
- It is mostly employed by the teachers at the primary classes to teach basic skills such as rules of grammar, arithmetic, spellings, etc.
2. Understanding level: This level focuses on comprehension and understanding of the meaning of the topic being studied. It involves breaking down complex topics into a logical sequence of steps.
3. Reflective level: It implies the highest level of thoughtfulness on the part of the learners. It involves the method of the scientific method of understanding of a problem. It makes use of the ‘problem-solving approach to find a solution to a difficult problem. This level of teaching is usually employed at the college/university level.

Hence, we can conclude that in-memory level of teaching, the teaching-learning process is stimulus-response.