When I observe a student in the class having difficulty with a subject maatter, I ask one of the strong learners in the group to seat next to the person.  The results of this coupling is very positive.  I have assessed a difference in the student's ability to grasp material.

I learned how important it is to assess what your students already know about a subject area before introduction of material.  In addition, I learned the difference between the different types of assessments to use during lesson planning.