Students will practice mentally or adding 10 from numbers 10-100 using the collaborative structure quiz-quiz-trade. Students will be given a card and then told to mix around the room. When instructed, they will find a partner and ask them the question on their card. The other student will answer and then ask their question. Once both have correctly answered the questions, they will find new partners. There are 24 cards in this resource. Print these front-to-back on dark colored card stock so that the answer cannot be seen through the paper.