I found some of the methods chosen for praise were a bit to overbearing. I would never tell a student how good a student he/she is. That is a real put down for the other students in the class.I just say excellent answer. I use a method where all students are engaged in the learning process. I create a real problem and asked each student to give me a solution for the circumstances and write his/her answer on the board. There will be a numer of different answers, I do not address the answers until everyone has given an answer. I then explain why they are incorrect and move along until I answer the correct solution. This allows each student to participate in the questioning process and learns at the same time with out the stigma of being wrong.