In which court case was the need for a qualified staff to implement ESL plans established?

The correct answer is Castaneda v. Pickard. This landmark case established the necessity for school districts to provide qualified staff to implement effective English as a Second Language (ESL) programs. The decision emphasized that educational programs for English Language Learners (ELLs) must not only be implemented but also supported by appropriate personnel who have the training and skills needed to address the unique challenges these students face.

In this case, the court set forth criteria for evaluating bilingual education programs, including the requirement for qualified educators who can effectively educate students in their native language while they acquire proficiency in English. This emphasis on the qualifications of staff ensures that ELLs receive the support they need to succeed academically.

Other choices do not specifically establish the requirement for qualified staff in the implementation of ESL programs. While Lau v. Nichols focused on providing equal educational opportunities for non-English speakers, and Idaho v. Migrant Council addressed issues related to the education of migrant students, it was Castaneda v. Pickard that specifically highlighted the need for appropriately trained personnel in the context of bilingual education. Title III Review Board relates more to the oversight of federal funding and program effectiveness rather than establishing staff qualifications.