What format or platform should be used for submitting a digital portfolio of twenty images when no format or platform is specified? The submission is for a secondary school position.
"Interested candidates are asked to send a cover letter, resume, and digital portfolio of twenty images to: JohnDoe@Boardingschool.com"
I am debating using a web service such as squarespace or Crevado, or creating a powerpoint to save as a PDF file. Any advice or other suggestions are appreciated.