The number reaching the expected standard of development by the end of reception year, or age 4 to 5, has risen to 74.1%.
The national average for Good development, which tracks a child’s expected communication and physical goals, is 68.3%.
Croydon Council says support from schools, nurseries and families has helped drive the improvement.
There are still a couple of weeks left of summer vacation. Are you waiting for school to start or could you continue your vacation? What are the best and worst things about going back to school?