I started my Student of The Week program this year with the hopes that it would motivate students to not only strive to achieve better grades but to also improve their behavior. It's been working quite well. I use Class Dojo to track points that the students earn and then which ever student has the highest point total, receives a student of the week certificate plus a trip to the prize box to choose two prizes. I have various certificates that I have made for them: This is one of my favorites.
I hope you find these to be blessings in your classroom as well.