Little circles

Remember those tests you took in grade school when you blackened the correct circle with a #2 pencil? Well, those little circles have now been given a whole new purpose in life!

The graph on the left is a sample used by the Kafwa in Luapula, Zambia to document the weighing of babies.  Each time a baby is weighed, a circle is marked.  The rows are also divided by age to show the number of babies weighed in each age group.  In case you ever wondered how we document the exact number of children monitored by the health workers each year, wonder no more!!