Integer: Tic-Tac-Toe Four In A Row!
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Conchita A. Little Terrell School
5410 South State Street
Chicago IL 60609
To use a phenomenological approach to the introduction of
integers using a coordinate plane and ordered pairs.
Chalkboard, color chalk, coordinate grid (drawn on the chalkboard),
numberline, and a large visual thermometer. Maps are optional.
Discuss integers as a subset of the real numbers, including zero (0),
positive (+) and negative (-) whole numbers.
Ask students to tell other real world uses for integers besides the
Introduce a numberline; allow students to count in a positive, then in a
negative direction starting at the origin zero (0).
Discuss with students the meaning of integers.
Locate a few integers on the numberline.
Emphasize positive and negative numbers.
Place a coordinate grid on the chalkboard.
Explain the coordinate plane, using the numberline as a basis.
Locate points on the coordinate plane first moving horizontally, then
Tell students the points found on the coordinates are called
Use the game of tic-tac-toe four in a row to give students practice
in locating coordinates using integers.
Teams were chosen to play tic-tac-toe four in a row on the coordinate
plane. Each team used a strategy to get four coordinates in a row either
horizontally, vertically or diagonally. Team members located the ordered
pairs successfully to win the game. The use of quadrants II, III and IV
Heimer, Ralph T., Trueblood, Cecil R. Strategies for Teaching Children
Mathematics. Addison Wesley Publishing Co., Reading, MA., 1977, pages