Join Sir Cumference, Lady Di of Ameter, and their son Radius for wordplay, puns, and problem solv...

Join Sir Cumference and the gang for more wordplay, puns, and problem solving in the clever math ...

Part of the popular Sir Cumference series! Baker Pia is back with a handy way of counting by tens...

Join Sir Cumference, Lady Di of Ameter, and their son Radius for wordplay, puns, and problem solv...

For use in schools and libraries only. Radius is on a quest to earn his knighthood! With only a c...

Join Sir Cumference, Lady Di of Ameter, and their son Radius for wordplay, puns, and problem solv...

Medieval math favorite Sir Cumference series is back! Lady Di of Ameter and Percilla Centwell fig...

Join Sir Cumference and the gang for more wordplay, puns, and problem solving in the clever math ...

Join Sir Cumference and the gang for more wordplay, puns, and problem solving in the clever math ...

Join Sir Cumference and the gang for more wordplay, puns, and problem solving in the clever math ...

'Sir Cumference and Lady Di learn a method to calculate the volume of grain needed to feed everyo...

Part of the popular Sir Cumference series! Baker Pia is back with a handy way of counting by tens...