The EDI is a short questionnaire completed by kindergarten teachers across Canada and internationally which measures children’s ability to meet age appropriate developmental expectations.

  Learn more

Looking for EDI implementation resources?

  Click here

News & Events

Offord Centre and EQAO collaborating to understand student trajectories

The EDI team is excited to announce a new collaboration with the Education Quality and Accountability Office (EQAO) to understand trajectories of student learning and well-being—from early childhood to adolescence.

Twenty years of the EDI in Ontario

The history of the EDI in Ontario is a history of the EDI itself. From consulting with educators in Toronto on the EDI items to implementing across the entire province in 2015, Ontario has played a crucial role in the EDI’s success.

  View more

Latest Reports

Does a mother’s sleep during pregnancy affect children’s development?

January 26, 2018

Sleep is incredibly important for children’s development. Getting 11-12 hours of sleep a day is associated with healthy development. Whereas getting too little sleep is associated with a host of problems.

Long-term outcomes for large babies

December 18, 2017

Studies show long-term risks for children born small for their gestational age. Early Development Instrument (EDI) research shows these babies are at greater risk for later developmental vulnerability. Less is known about babies born large for their gestational age.

  View more


Completed EDIs

The EDI information collected for five-year-old children in Canada since 2004

12 of 13

Provinces & territories

Canadian provinces and territories EDI has been implemented in


Of children vulnerable

The number of children vulnerable in at least one developmental domain





The number of children vulnerable in at least one developmental domain by gender

Global Reach

Countries in which the EDI
has been implemented: