EDI Overview

This page is a starting point for understanding the meaning of school readiness and how the EDI (Early Development Instrument) helps measure our successes and needs on a community level.

What is the EDI?

The formative years from conception to age 6, play an essential role as the base of healthy development. Being ready to learn at school is crucial to the long-term success of our children. The EDI (Early Development Instrument) is a questionnaire designed by the Offord Centre for Child Studies at McMaster University that has provided the very first outcome measurement of our 0-6 system. This measurement allows us to objectively and comparatively determine how we are doing in supporting children during this crucial period of child development.

Download Handout: EDI Factsheet
Download Handout: EDI Backgrounder

Defining Readiness to Learn

EDI_ReadytoLearnPieChartReady to Learn

“Very Ready” – A child scoring in the top 75th percentile of Simcoe County on particular domain.
“Ready” – A child scoring in the middle 50th percentile, or between the 25th and 75th of Simcoe County in a particular domain.

Not Ready to Learn

“Not Ready & At Risk” – A child scoring in between the 10th and 25th percentile of Simcoe County on particular domain.
“Not Ready & Most Vulnerable” – A child scoring in the bottom 10th percentile of Simcoe County in a particular domain.

Because percentiles are used to describe whether a child is ready or not in comparison to others, “Readiness” is a relative measure to each site. The actual score that one child gets in Simcoe who is defined as ready, may not qualify as ready in another area of the province for example. This relative measurement helps us to look at strengths and weaknesses within our community. However, whenever possible comparisons to Ontario data have been made in Simcoe reports so we can better understand how we are doing on the larger picture as well.

Five Domains of School Readiness

EDI_5DomainChartPastelThe EDI assesses 5 domains of school readiness:

  • Physical Health & Well-Being
  • Social Competence
  • Emotional Health & Maturity
  • Language & Cognitive Development
  • Communication & General Knowledge

Sixteen Sub-Domains of School Readiness

Four of the five domains are divided into sub-domains. Understanding the 16 sub-domains allows early years service providers to be specific as to what needs should be targeted in program planning. The following is a description of the domains and sub-domains. To print this in French or English, download the EDI sub-domains handouts below.

Download EDI Sub-Domains Handout
English  |  French