The Fairfax County Public schools (VA) presents Familygram, a newsletter directed to parents to help them better discuss and use test results for the improvement of their child's education and the quality of the education program in Fairfax County. An attempt is made to answer several important questions: What tests are given? Which of them are required? and What can they measure? What can't they measure? Also discussed are how tests can be used to improve instruction and how to accurately understand the test scores. A schedule of tests required either by the Virginia Department of Education or the Fairfax County School Board is presented. An included glossary defines norms, percentiles, percentile bands, educational ability tests, and achievement tests. (PN)