My DD was also waitlisted for NAPS today. This was in her email: Candidates for preparatory school will be considered after we have received notification from all candidates to whom we have already offered admission. Once that number is finalized, we will competitively award available offers to attend to candidates who choose to remain on the preparatory school Wait List.
The deadline for candidates to accept or decline their offer of admission to NAPS is May 1, 2019. You can expect the Admissions Board will be able to review your file for consideration for an appointment after mid-May, but it could be as late as early July. Please refer to "Questions and Answers about the Wait List," available on the Candidate Information System, for more information.