National Longitudinal Survey of Children and Youth - Survey Overview (Cycle 7) The purpose of this document is to describe the content and design of Cycle 7 (2006/2007) of the National Longitudinal Survey of Children and Youth (NLSCY). It is a companion report to the two documents containing the survey questionnaires, National Longitudinal Survey of Children and Youth: Survey Instruments for 2006/2007 Data Collection, Cycle 7, Books 1 and 2.