Instructor Stewart Moredock (Sacramento State College) gives a lesson on teaching elementary school mathematics. Topics include: proving patterns for adding and subtracting fractions with similar denominators, developing equivalent fractions, and using known patterns to solve math problems that include fractions. Color picture with sound. Eastman Kodak edge code reads "plus plus," which correlates to 1968. Production title: Division of Rational Numbers. Print No: 104. Number on can: 1105.

Instructor Stewart Moredock (Sacramento State College) gives a lesson on teaching elementary school mathematics. Topics include: proving patterns for adding and subtracting fractions with similar denominators, developing equivalent fractions, and using known patterns to solve math problems that include fractions. Color picture with sound. Eastman Kodak edge code reads "plus plus," which correlates to 1968. Production title: Division of Rational Numbers. Print No: 104. Number on can: 1105. Film is suffering from vinegar syndrome causing the film images to turn pink.