For the variant incentive cover editions, the original numeration was dominant on the cover while the vol. 2 numeration was the watermarked numbering marking.
In each grade level, content is divided into six strands: number and numeration, operations and computation, data and chance, measurement, geometry and patterns, functions, and algebra.
He has faced much criticism because his methods originate from new age theories such as geometric patterns, numbers in nature and divine triangle numeration.