The commonalities in assessment are the items that we feel are important to include in all assessments. 

1.  Trials

2.  Academic levels

3.  Connection between AT and goals

4.  Strengths/Skills in relation to AT areas of need

5.  Past AT that has been tried

6.  Feature match - leads to justification for the purchase of certain technology

7.  Other commonalities within areas of AT (ie. general, access, and AAC)