The Middle Years Development Instrument (MDI) is a self-report questionnaire
that asks children in middle childhood about their thoughts, feelings and
experiences. The MDI is the first survey of its kind to gather information about the
lives of children both in school, in the home and in the community, from their own
perspective. The survey questions align with the BC Ministry of Education’s K-12
curriculum which includes a focus on promoting children’s personal and social
Access the the MDI at