CPL’S Rahm’s Readers Summer Learning Challenge November 15, 2016 | By Veronica Brown Categories: Summer Learning Challenge | Tags: Avery McDowell, Rahm's Readers, STEAM, STEM, summer learning For decades Chicago Public Library has challenged Chicago children to read during the summer. In 2013, with support from Mayor Rahm Emanuel, CPL redesigned its summer program to more intentionally support 21st-century learning.