The NHD Contest Rule Book is a one-stop shop to answer all of your questions about the NHD project and the competitions.  For returning NHD students, the rule book will look a bit different: NHD has a brand new contest rule book and new evaluation forms this year.  We also have a version in Spanish: NHD Manuel de Reglas Para Competencias. Prefer videos? Review the NHD rules for all categories with this playlist. Make sure to review the NHD Evaluation Forms to see how judges will be assessing your work.