Numberline Frog: Hoppin' Below Zero! app for iPhone and iPad

Introducing our newest installment in the Numberline Frog series. This larger iPad app extends our interactive numberline into negative territory. With an animated frog, cartoon sounds, and a game-like format, Hoppin Below Zero offers an approachable introduction to the concept of negative integers for your early elementary mathematician.

Key features include:

-- randomly generated math problems with answers ranging -8 to 8 -- subtraction of negative integers is omitted

-- child responds using numbered buttons which are arranged on a standard numberline

-- animated frog illustrates each problem by hopping along the numberline once the correct answer is chosen

-- child earns a star for each problem answered correctly on the first attempt

-- three game modes are included: addition, subtraction, and mixed problems