What a great writing, @fun2learn!..Successful education just can be facilitated by good educators who have worked hard to understand their students' characters well, to know how to treat their students with all their differences so that a good atmosphere in learning can be successfully created too. Fun and joyful learning, I do agree with this issue. At last, appreciation for all the students' hard works by giving praise, I also say "yes", but sometimes this such reward does not always give positive impact to a certain student.
Over praising may cause praise to be diluted and cheap too. Teachers should be generous with their praises but they should give praise at the right moment to have a greater impact.