Addition
Assumption: relevant prerequisites (counting, the base-10 system, etc) were developed in similar settings.

Addition as a Process

  1. (i) Start with two containers into each of which a known number of pieces are put. (ii) Combine contents of the containers' pieces into a larger container. (iii) Count the number of pieces in the big container.

     ° 
    ° °
     ° °
    		+
     ° 
    ° °
    		 =
    ° ° ° ° 
     ° ° ° ° 

  2. Cuisenaire Rods
· · · · ·
+
· · ·
=
· · · · · · · ·
  1. Use an Number Line:


    (C-1): Cardboard Number Line and pennies
    (C-2): Pencil-drawn Number Line and "dot"

    (i) Start at "5" (ii) Move "up" by 3 (iii) Note final position.

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