This text investigates how second language acquisition research serves as a foundational framework for informed classroom decision-making. Authors Beverly Hartford and Kathleen Bardovi-Harlig leverage their expertise in applied linguistics to bridge the gap between theoretical research and practical teaching applications. The book argues that effective instruction requires teachers to move beyond rote adherence to specific methods by understanding the underlying cognitive and social processes of language learning.

Experts and educators frequently cite this text as a foundational resource for bridging the divide between academic research and classroom application. Readers often note the academic density of the prose, which is designed for graduate-level teacher education programs and professional development.