The RS2 Level C Lessons continues to build on known addition and subtraction facts, works with 4-digit addition and subtraction and 2-digit mental calculations and introduces multiplication and fractions. Other topics include area and perimeter, measurement, money, time, and basic fractions. They also work with drawing tools to explore geometric designs. Problem solving is emphasized. Card games are included in the lessons. Review lessons are included for children new to the RightStart program.