Fraction Bars Glasses A fun and practical way to introduce fractions. Fraction Bars for halves, thirds, fourths, fifths sixths tenths and twelfths are printed on the sides of these glasses, and as a glass is filled the various parts of the bars become shaded. Using these glasses provides a natural way to talk about parts of a whole and to pose questions. The glass shown here is more than 1/3 full and is almost half full. The tenths bar on this glass is labeled with fractions, decimal, and percents to help students become fluid in using these three types of numerals. This 9 ounce glass is just under 5 inches in height.