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Individual Growth and Development Indicators
for Infants and Toddlers

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Quarterly or Monthly Assessments

A general rule to follow is to conduct quarterly assessments unless two or more consective points fall at least 1 standard deviation below the norm. So, if you see at least two data points in the grey or light grey regions of the graph (like the sample graph below), you should begin monthly monitoring. Otherwise, stick with quarterly assessments.

Learn more about using IGDIs to guide your decision making about early intervention