"The mathematical concept of equal fractions is introduced as readers learn how to build a doghouse. Readers learn about numerators, denominators, and common factors. Includes a discover activity, history connection, and mathematical vocabulary introduction"-- Provided by publisher.

IMath ideas : freaky fractions -- Discover activity : equivalent lengths -- Gentle giants -- The mighty screw -- Connection to history -- Pressing innovations -- Nifty nails -- Lunch time -- Math at work -- iMath ideas : Ivy Sue's new home -- What comes next?.