Real Number System Foldable

This Idea came from Dinah Zike's Foldables. Directions were revised by Jamal Hutchinson,

Numeracy Coach Johnson/Baxter ALC, original by Barbara Broadway, Math Mentor at

Maplewood High School

Materials

Materials Pre-Cut

Dark Green 8 ½ in. x 11 inYellow 8 ½ in. x 5 ½ in.Bright blue 4 ¼ in. x 5 ½ in.Beige 4 ¼ in. x 5 ½ in.Orange 4 ¼ in. x 5 ½ in.Light green 4 ¼ in. x 5 ½ in.Pink 4 ¼ in. x 5 ½ in.

Types of Folds

Hot dog fold light green

Cut a window by cutting a ½ in from bottom to a ½ in to the long side to a ½ in from the top.

Stop cutting. Don’t cut across on the top.

Hot dog fold orange

Cut a window by cutting a ½ in from bottom to a ½ in to the long side to 1 in from the top.

Stop cutting. Don’t cut across on the top.

Hamburger fold yellow sheet.

Cut a window by cutting a ½ in from bottom to a ½ in to the long side to a ½ in from the top.

Stop cutting. Don’t cut across on the top.

Assembly

Slightly hamburger and hotdog fold the dark green sheet

Center the pink sheet on the left side paper

Slightly hamburger and hotdog fold the dark green sheet

Center the light blue sheet on the right side paper

Apply glue around the edges of the pink rectangle and lay the beige rectangle on it so that it opens from bottom to top.

Apply glue around the edges of the beige rectangle and lay the orange rectangle on it so that it opens from bottom to top.

Apply glue around the edges of the orange rectangle and lay the light green rectangle on it so that it opens from bottom to top.

Apply glue around the edges of the rectangle made up of the light green and bright blue rectangle

No glue down the middle where they join

Lay the yellow rectangle on them so that it opens from bottom to top.

Label

Pink: N = Natural Numbers or Counting Numbers 1,2,3,4…

Beige: W = Whole Numbers 0,1,2,3….

Orange: Z = Integers …-3,-2,-1,0,1,2,3…Light green: Q = Rational Numbers a/b a and

b Z, b = 0

Bright blue Ir = Irrational Numbers non-terminating and non-repeating decimals, pi, square roots of non perfect squares, pattern decimals, golden ratio.

Yellow: R = Real Numbers

All colors can be changed for another color.

Only thing that matters is the folds and cuts.