There is disclosed a core structure with a very low profile, high power density and lower losses. This detection circuit is responsive to a transition of a number of address inputs to generate a trigger signal. A plurality of thermally conductive elements, such as spring fingers, ribs and fins, provide additional thermal heat dissipation paths and enhance the rigidity of the guide members. The teachereducator administers the assessment and assessment forms are manually marked, collected and scanned at the MFD, entered into storage and the marked images automatically analyzed and the assessments automatically evaluated from stored rubrics and the teachereducator is automatically notified by email that the evaluation has been performed.