This two-book set with included Hot Dots® 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.Psst…They’re Learning! Playful, interactive learning Encourages parent-child interaction Develops early math skills necessary for school success Offers confidence-building feedback Provides ample practice time Cut to the Chase 85 Second-grade-level lessons in these areas: Counting & Numbers, Patterns, Time, Shapes/Geometry, Fractions, Measurement, Money, Place Value, Algebra, and Math Facts, PLUS 15 challenge reading lessons for advanced learners Book set includes Hot Dots® interactive, electronic pen Hot Dots® pen requires 2 AAA batteries (not included)