The UK National Portrait Gallery, which has made its collection of almost 200,000 portraits searchable online since the early days of the world wide web (http://www.npg.org.uk/collections/search/), now offers this digital resource page with a variety of tools to help both teachers and casual visitors better utilize its collections. Teacher's resources are provided for primary and secondary students, with those for secondary divided into resources for the study of art, such as "Portrait Photography From the Victorians to the Present Day;” and those for the study of history, such as "The Anti-Slavery Convention: A guide to the painting, The Anti-Slavery Society Convention, 1840 by Benjamin Robert Haydon.” Resources with a broader appeal include, "Portraiture and Art Techniques,” a guide to the materials and techniques of portraiture, and a set of interviews with artists and sitters, some with audio or video, others as transcriptions.