This is a fun way for your students to practice doubles addition and can be reused again and again! Each page can be cut into a half letter-size sheet and laminated. I punched holes in the sides and made books out of them. My students then used dry erase markers to draw the matching number of spots on each ladybug wing, counted them, and wrote the number sentence. I used this as a center activity with an exit ticket for students to show their work. Numbers 1+1 to 10+10.