I started off writing them myself, but as time passed we took the time to learn how to write sincere, detailed praise and thanks and it took off from there. Looks great on coloured paper and taped to the entrance of the classroom door.
Love this idea! (I often see similar activities for math, but this is the first time I've seen this activity used within a literacy lesson.) This could be a great exit ticket idea for the topic they just learned about.