An improved instructional method, whose advantage is in being directed and focused upon the point of math education where students are introduced to the three correlated nomenclatures of angle measure; degrees, radians, and gradians. This device removes the obfuscating array of incrementation marks, that are found piecemeal in the existing body of prior art, from the conventional circle design and replaces them with only the marks of incrementation that are already well known to the student at the time of their introduction to the various nomenclatures of angle measure; 24 hour incrementations, and 60 minute incrementations. The amount of equal angle measure through which the radius line pointer may be rotated is then clearly stated upon the design for both, the hour marks and minute marks of incrementation; .pi./12 radians=50/3 grads=15 degrees, and .pi./30 radians=20/3 grads=6 degrees, respectively.