One of the major factors hindering the learning of Mathematics is the failure to learn or retain the prerequisite knowledge needed to learn a new concept or learning objective.  Unless there is some means of addressing the reacquisition of this knowledge, a student is bound to experience anxiety and frustration over repeated unsuccessful attempts to learn Mathematics.  I have identified a computer assisted assessment and learning program that accurately and precisely, on an ongoing basis, identifies what a student knows, what a student does not know, and what a student is ready to learn.  This program is called ALEKS (Assessment and Learning in Knowledge Spaces).  You may investigate this program for yourself at http://www.aleks.com .  This program allows me to quickly identify where to begin with a given student and keeps me current with the progress being made.