Abstract: A method comprising accessing a first data structure that is associated with a first product prepared by a student and that includes first process data associated with a process performed by the student in generating the first product, analyzing the first data structure to generate a first characterization score based on the first product and the first process data, accessing a second data structure that is associated with a second product prepared by the student and that includes second process data associated with a process performed by the student in generating the second product, analyzing the second data structure to generate a second characterization score based on the second product and the second process data, and calculating a skill level change metric based on the first characterization score and the second characterization score indicating a change in ability level of the student over a course of the scenario-based assessment.

Abstract: An insulation reviving and treatment apparatus and method includes an air tube with a first end and a second end and a hollow interior. An opening is provided in the first end and in the second end. A handle is attached to the second end where the handle includes a trigger. An air hose is connected to the handle and to a source of air such that operation of the trigger causes air to exit the opening in the first end. And a baffle is attached to the air tube.