Addition and Subtraction strategies
           The Number Strategy Framework
           A Model for a Teaching Progression 
           Some Questions
           Using materials
           Encouraging Imaging
           Towards number properties
           Subtraction strategies
           Subtraction and addition problems
           From Number to Algebra - solving equations
        Strategy Framework
        0  Emergent
        1  One-to-one counting
        2  Counting from one with materials
        3  Counting from one by imaging
        4  Counting on
        5  Early Part-Whole
        6  Advanced Part-Whole
        7  Advanced Multiplicative
        8  Advanced Proportional
           Objective
               To explore links between numeracy and algebra
           In particular:
               To show that images used to help solve number problems also 
                develop understanding for solving complicated linear 
                equations.
               Answers Only Please
               1.   46 + 19                                 7.         47 + y = 83
               2.   61 – 27                                 8.         53 - m = 27
               3.   14 + ?  = 101                           9.         2x + 1 = x + 7
               4.   78 + 124                                10.        2x - 1 = 8 - x
               5.   9000 – 8985                             11.        26 + 7 = ? + 12
               6.   403 - 98                                12.        88 + x = 120 + ? 
        A Teaching Progression
         Start by:
          Using materials, diagrams to illustrate and 
           solve the problem
         Progress to:
          Developing mental images to help solve 
           the problem
         Extend to:
          Working abstractly with the number 
           property