Daniel R. Rettig is a 21-year veteran math teacher in the Henrico County Public Schools in Virginia. For the past four summers he has apprenticed for School Scheduling Associates working with over 1000 different schools and districts. He has been instrumental in formatting, indexing, and uploading the over 500 schedules now included in the Library of School Schedules. He and his wife Erin, an elementary counselor in the Henrico County Public Schools, are the proud parents of two wonderful children.