Recommended for those who aren't committed to opening a concrete scanning division, but are investigating the opportunity.  The first course "GPR Fundamentals 1" gives a good idea of the difficulty of the subject matter. Every subsequent course is either as difficult or easier. Keep in mind that they have to be taken in the correct order - the courses in the Procedures knowledge block are entirely explained by applying the RadRay Model, taught in GPR Fundamentals, to concrete structures, taught in Concrete Structures Basics. When the student successfully completes all 5 courses, they will be awarded a GPR-C Technician - Comprehensive Certificate.