Ten Sly Piranhas Math Pack

Ten Sly Piranhas by William Wise

Written by Kathy Ives, Earl Buxton School, 1996

 OBJECTIVES:     Review counting backwards

Introduce subtracting ( -1)

 MATERIALS:       10 fish crackers

Book, Ten Sly Piranhas (R)

Math Journal (R)

10 Take Away cards (R)

 A.                Read the book and discuss some of the following questions:

What is a piranha (discuss some of the facts located on the inside of the back cover relating to piranhas.)

            What does it mean to be “sly”?

B.                 Using the goldfish crackers, practice counting from one to ten.

                        Lay 10 goldfish out in a row.  Count them starting at 1.

                        Now, start at the other end and count backwards from 10.

Reread the story with your child and his crackers.  Let him pretend he is a hungry piranha eating one goldfish “with a gulp and a gurgle” along with the story.  Have him predict and verbalize the new number each time.

Optional:  Use the take away cards to demonstrate how we write the action of take away.  (“10 – 1” is telling you to start with a group of 10 and remove one.)  Now, choose another card.  What does it tell us to do?)

C.                 Continue counting higher than 10.

Using your child’s fingers and your fingers, count up to 11.  Now count backwards from 11, having one finger disappear each time.  Can he/she go higher?  Try 12, 13, 14, 15 and then backwards each time.

D.              Have your child practice writing the numbers from 0-10 in his/her Math Journal  (0, 1,2,3,4,5,6,7,8,9,10)

                        Then write them in the reverse order from 10 – 0.

                        Try to encourage proper spacing between each number.

E.            Drawing and labeling sets.

Draw a set of 10 things (fish, perhaps) and label it 10. 

Draw a set of nine things and label it 9.  Continue in this manner with each set becoming one less, until you reach zero.  (Try to use a maximum of one double page in the Math Journal for this drawing activity.)