Terms and concepts currently in use in adult English-as-a-Second-Language (ESL) instruction are defined and explained. They include: authentic or alternative assessment; computer-assisted language learning; critical literacy theory; family and intergenerational literacy; multiple intelligences and learning styles; practitioner inquiry, reflective teaching, and action research; project-based education; social identity; and workforce training, employability skills instruction, and SCANS (Secretary's Commission on Achieving Necessary Skills). In each case, the scope of the term is specified and references to current literature are made. The SCANS skills are summarized. Contains 25 references. (MSE)