In this workshop paper a strategy to teach basic and advanced math concepts using RangoLee designs is discussed. The author has developed a supplementary mathematics scheme called DOT.MATH based on RangoLee designs, following the NCTM standards for grades K to 8. This scheme is aligned with the regular math curriculum; however some higher level concepts and activities such as combinatorics, computer algorithms and network theory are also addressed. In the workshop, aimed at teachers from elementary schools, interested participants will learn to create RangoLee designs and experience the use of the scheme. Participants will be encouraged to assess the advantages and disadvantages of the method and the tools.