Math Intervention 3–5 Grade

Addition and Subtraction Concepts 71

X Marks the Spot

A game designed to build the concept

of adding doubles and near doubles

Materials:

Q^ 0–9 Number Cards or 0–9 Number Tiles

in a paper cup

Q X Marks the Spot Game Boards

Q^ Two highlighters or light markers (different colors)

Directions :

1. Players decide which color highlighter each person will use.


2. Without looking into the cup, the fi rst player chooses a number.
   The player doubles the number and looks for the sum on the
   game board.


3. The player marks the sum with a dot using the highlighter to
   “hold” the spot and places the number back into the cup.


4. The next player chooses a number, doubles the number and
   looks for the sum on the game board. The player can mark the
   sum with a dot to hold it OR the player can “claim” any sum
   that is currently being held with a dot.


5. If the player claims a held sum, the highlighter is used to draw
   X on the sum.


6. Players take turns choosing numbers, doubling, and holding or
   claiming sums. Note: All sums must be held before they are claimed.
   Held sums can be claimed by any player.


7. The winner is the fi rst player to have four claimed sums (Xs) in
   a row (horizontal, vertical, or diagonal).

Content Differentiation :

Moving Back: Play the game without holding sums prior to

claiming sums.

Moving Ahead: Play the same game using Near Doubles. The near

double is one more or one less than the closest double.

PLAYERS:

2