Hankie always does the same things at the same time. He even sneezes on schedule. The other horses tease him. What a bore! Hankie's determined to prove that he can be unpredictable if he wants to -- but can he? Or will he just end up being the same old Hankie? Horses, humor, and a great big sneeze all combine to explain how to look at past events and make predictions about the future, an important element of logical thinking.

Introduces simple addition through a rhyming text about animals being delivered for a merry-go-round.

As six monsters play a wild game of musical chairs, readers learn to subtract--one chair at a time.

The Elm Street Kids' Club decides to sell lemonade to earn money to fix up their clubhouse and they use a graph to keep track of their sales.

Teaches division as a group of friends goes on different carnival rides.

As members of a swim team do laps to qualify for swim camp, readers can practice subtracting two-digit numbers to see how many laps are left to go.

While piloting his spaceship through the skies, Captain Invincible encounters three-dimensional shapes, including cubes, cylinders, and pyramids.

At a family reunion, the cousins line up in order of their ages to get their pictures taken, introducing the concept of numerical order.

While trying to save enough money to buy a new ice scooter, Perry the Penguin learns about managing his money and about negative numbers.