Surprise for our oral teachter

Last Thuesday, we students gave our oral teachter, Paul, a big surprise. Karina is one of students and this surprise was planned by her. Few days ago, She bought a card which form is a puzzle and she asked us to wrote some words on the card for Paul. After we all finished writing word, Karina used a glass to decorate the card. It was so nice and beautiful.
How do we gave him this surprise? Before teacher Paul came in the classroom, we turned off the lights. When he came in, we sang a Chrismas song together and gave him the card. Absolutely, he was soooooo surprise and he said that he will cherish this card we wrote. Hahaha.....After party, we still had to discuss our lesson. But, it was a good memory for me, also for Paul, I guess.