Mental Math Mentor software operates in a self-paced tutorial format. Students learn short-cuts and skills for success in the Number Sense contest. The exercises and examples are presented clearly and logically, and were selected by Don Skow, long-time director of the contest. Some 70 skills are presented with problems generated for each to test your students thoroughly. A one-year extended usage license is available for installing on up to five students' PCs. Mental Math Notes is a printed version of all the skills in the Mental Math Mentor, available for those who prefer to ferret information from a book. All shortcuts and skills presented in the software are included in every product. Mental Math Mentor and Notes is also available for purchase in a set.