Cut-Out Labeled Fraction Circles 11–20 (C217-1) continue the fraction series through twentieths, supporting children who are ready to explore increasingly precise fractional quantities in the upper range of lower elementary math work. The labeled pieces allow children to investigate patterns in unit fractions and begin building intuition for relationships that will later support decimal and ratio work. This set is most effective when used alongside its companion C217 set so children can make direct comparisons across the full range.