Demonstrate fractions, percentages and equivalencies on your whiteboard. Helps students understand relationships between concepts of fractions and percentages - labeled with fractions on one side and percentages on reverse. Supports key NTCM Standards. Includes 9 circles, each measuring 7.5", includes whole, 1/4, 1/2, 1/3, 1/4, 1/5, 1/6, 1/8, 1/10 and 1/12. Includes Activity Guide. Grades 1 and up.