The fonds consists of records which document Borden's teaching career from Kindergarten instruction through university professor of early childhood education. The fonds is divided into eight series: biographical series, correspondence series, playschool series, literary productions series, printed materials series, subject files series, Child Study Centre series and audiovisual series.

Fonds consists of biographical notes, clippings, articles, early educational records, research notes, draft manuscripts, field notebooks, reports, publications, correspondence, lecture and course notes, maps, photographic prints, and slides pertaining to M.Y. Williams' professional and personal activities.