This guide is designed for teachers of multilevel classes in English as a Second Language (ESL) at the adult level. The first section discusses principles, methods, and techniques for classroom instruction, including student grouping, appropriate ESL teaching methods (audiolingual, vocational, language experience, natural approach, grouping/layered learning, sheltered English, grammar/translation, and Total Physical Response), designing an effective lesson plan; time factors in the multilevel classroom, evaluation of adult ESL students, and seven unusual techniques for the ESL class. The second section consists of three instructional modules for ESL teacher training: problems and solutions in the multilevel ESL classroom; the bilingual approach in multilevel classes; and developing effective listening skills for non-English speakers. Two lesson units are: intonation of the English language: singing English; and sample lessons designed for the multilevel ESL classroom. (MSE) (Adjunct ERIC Clearinghouse on Literacy Education)