"You're o-FISH-ally the best teacher." (Swedish Fish)
"You are the RIESEN we like learning."
"We SKOR'd when we got you for a teacher."
"Thank you for making learning MOUNDS of fun."
But the little boy who brought this one to me made me giggle because he left out one important word as he said, "You've made us NUTS learning."
Yep. That probably accurately described how he feels, too. Gotta love 'em!