Data Sources and More Information

There's so much to know about child development and the importance of school. We've tried to summarize what we consider some of the more important points throughout the website, but we've also put together this resource page in case you'd like to know where to find out more.

• ^[1] “90% of a child's critical brain development happens by age 5” - firstthingsfirst.org, first5california.com, NIH: Brain development (graph)
• ^[2] “Preschool is the most important grade” - ASCD.org
• ^[3] State standards for preschool staff-to-student ratios: 3-year-olds are 13:1, 4-year-olds are 15:1 azdhs.gov (p. 29)