Instructor Stewart Moredock (Sacramento State College) gives a lesson on teaching elementary school mathematics. Topics include: patterns for division on rational numbers, using the number line to check solutions for division problems, reciprocals. Color picture, sound. Eastman Kodak edge code reads "plus plus," which correlates to 1968. Production title: Ratio Rate, Percent. Print No: 112. Number on can: 1100

Instructor Stewart Moredock (Sacramento State College) gives a lesson on teaching elementary school mathematics. Topics include: patterns for division on rational numbers, using the number line to check solutions for division problems, reciprocals. Color picture, sound. Eastman Kodak edge code reads "plus plus," which correlates to 1968. Production title: Ratio Rate, Percent. Print No: 112. Number on can: 1100Film is suffering from vinegar syndrome causing the film images to turn pink.