Dec 1 : 'Reteach number concepts.'.
Dec 2 : 'Additional practice'.
Dec 3 : 'Begin double digit math.'.
Question 1 : 'Did student score less than 50%?'
   Why 'Because student has not mastered number concepts.'
   Answers  1 'yes'
            2 'no'.

Question 2 : 'Did student score more than 50 and less than 80%?'
   Why 'Student needs additional practice.'
   Answers  1 'yes'
            2 'no'.
Question 3 : 'Did student score above 80%?'
   Why 'Because student is ready to go on to double digit math.'
   Answers  1 'yes'
            2 'no'.
Rule 1 :
   Why 'If score is below 50% student needs remediation of number concepts
        before going on to single digit addition.'
   IF q1a1 THEN d1.
Rule 2 :
   Why 'If score is above 50% and below 80%, student needs additional
        practice.'
   IF q1a2 and q2a1 THEN d2.
Rule 3 :
   Why 'Student has mastered single digit math.'
   IF q1a2 and q2a2 and q3a1 THEN d3.