Mental Math Mentor software in a self-paced tutorial format is a collection of exercises, examples, short-cuts, and skills specifically for use in the Number Sense contest. Some 70 skills are presented clearly and logically with problems generated for each to test your students' understanding. Mentor installs on multiple computers at one location. A one-year extended usage license is available for installing on up to five students' PCs. Mental Math Notes ia also available for purchase as a printed version of all the skills in the Mentor for those who prefer to ferret information from a book. Mental Math Mentor and Notes are also available for purchase in a set.