According to the text, "The history of assessment of minorities who are bilingual students or learning English as a second language is one of potential bias. Children have been, and continue to be, tested in their nondominant language (English) or with instruments that were validated in Anglo, middle class samples of children. As a result, many Hispanic preschool children were and are still regularly diagnosed as being developmentally delayed, speech/language delayed, or having some other type of disability..."

As a teacher, what suggestion(s) can you make to the researchers that develop assessment instruments to eliminate potential biases toward English Language Learners (ELLs)?