Planet informational reading with a riddle to solve by using math skills and a code to find the answer to each riddle. This is a fun way to learn about our solar system while practicing addition, subtraction, number patterns, greater than and less than, even and odd, multiplication, and mental math addition.My students love collecting stamps with the Planetary Passport. Students earn stamps by completing each planet math riddle. There is a colored version of the passport or a black and white ver