This document summarizes key points about second language acquisition from chapters in two textbooks. It discusses that while some are born bilingual, most learn a second language later in life. Acquisition means natural learning through use, while learning is a more conscious effort. Factors like age of exposure, motivation, classroom environment, and use of the language can impact success. Practice is important, and adults have advantages over children but learn differently. Full fluency may require hundreds of hours of study and use over time.