This report describes a project developed by the American National Metric Council (ANMC) to assess the effectiveness of the parent-through-child learning model as a method of transmitting metric knowledge. The model used has been in effect in one classroom in El Cajon, California since 1974. An elementary level classroom teacher there initiated and implemented an effective program of teaching metrics to parents of 4th, 5th, and 6th grade students. This investigation reports on the model as implemented at the Cannon Road Elementary School in Silver Spring, Maryland. Four of five teachers of grades five and six mathematics participated. Statistical analysis of data shows all groups of learners increased their metric knowledge significantly as a result of participation. The only possible exception was male parents, whose mean pretest score was the highest of any group. Additional research is viewed as necessary to provide insight into the learning process which occurred at home. It is not known whether children actually taught parents or whether adults gained knowledge from self-instruction. It is felt that with some modification, the instruction model could easily be duplicated in other parts of the country, with assurance that substantial gains in metric knowledge would be achieved. (MP)