The primary purpose of this handbook is to assist teachers who want or need to become authorized by the state of California to teach limited-English-proficient (LEP) students by earning the new Crosscultural, Language, and Academic Development (CLAD) or Bilingual, Crosscultural, Language, and Academic Development (BCLAD) certificates. Section 1 discusses who is required to hold the CLAD/BCLAD certificates, which were first authorized for issuance in July 1994 and replace Language Development Specialist certificates and Bilingual Certificates of Competence. Teachers who provide instruction for English language development, specially designed academic instruction delivered in English, instruction for primary language development, and content instruction in the primary language are required to have the CLAD or BCLAD certificate. Section 2 describes the CLAD/BCLAD system for the preparation and credentialing of teachers for ESL students. Section 3 provides the general requirements for CLAD and BCLAD certificates. Section 4 examines the requirements for CLAD and BCLAD certificates for teachers who already hold or have met certain requirements for other documents that authorize services to LEP students. (MDM)