Students should build their own internal motivation; they should not depend on their teacher to praise them.
This is a well intentioned but slightly misinformed belief held by many educators. While we want our students to be self-reliant and good self-managers of their own learning, praise is also a good way to build positive relationships with teachers, which is a critical base for the educational process. One of the best ways to develop positive relationships and connect with students is to reinforce the appropriate choices they make. Boys Town Well Managed Classroom model recommends you make four positive or reinforcing statements for every one corrective statement with a student. Not only does this help you to develop a stronger relationship with students but also helps to creates a positive climate in the classroom and school wide. This mirrors the Positive Behavior Support theory that it takes 8 positive comments to negate 1 negative comment.
Studies suggest that youth prefer being taught by adults who give positive feedback, set clear expectations with reasons to back them up, and show enthusiasm and concern. Similarly, studies have shown that students are more positive and friendly with others in their classrooms and develop more positive “attitudes” when they experience warm and accepting relationships with their teachers (Prawat & Nickerson, 1985; Solomon, Watson, Delucchi, Schaps, & Battistich, 1988).
-taken from Well Managed Schools, Strategies to Create a Productive and Cooperative Social climate in your Learning Community.