The Knowledge GAP: The Hidden Cause of America’s Broken Education System and How to Fix It by Natalie Wexler confronts the difference between content-rich and skills-based ELA curricula and makes a strong case for the former. She argues that students need a strong knowledge base in their long-term memories in order to comprehend complex text and to think critically. They also need systematic phonics instruction to learn how to decode words as they gain knowledge beyond their personal sphere. She sees a shift away from a focus on skills and leveled readers slowly taking place.