This two-book set with included " Ace" —the Talking, Teaching Dog® pen provides children with 100 lessons on a variety of math skills, from counting & numbers and patterns to time and fractions. Fifteen of the 100 lessons are challenge activities that prepare children for skills at the next grade level.PsstThey're Learning.• Playful, interactive learning• Encourages parent-child interaction• Develops early math skills necessary for school success• Offers confidence-building feedback• Provides ample practice timeCut to the Chase• 85 Kindergarten-level math lessons in these areas: Counting & Numbers, Patterns, Time, Shapes & Geometry, Fractions, Measurement, Money, and Math Facts, PLUS 15 challenge reading lessons for advanced learners• Book set includes Hot Dots Jr. " Ace" —the Talking, Teaching Dog® interactive, electronic Hot Dots pen• Hot Dots® pen requires 2 AAA batteries (not included)