Which assessment approach best measures an ELL's proficiency level in English?

The most effective approach for measuring an English Language Learner's (ELL's) proficiency level in English is through regular, informal assessments combined with observations. This method provides a comprehensive view of a student's language abilities, as it takes into account multiple aspects of language use, including speaking, listening, reading, and writing.

Informal assessments, such as classroom observations, can capture the nuances of language acquisition in real-time contexts, allowing educators to understand how the student interacts with peers, engages in discussions, and applies their language skills in various situations. Moreover, this approach recognizes that language proficiency is not static and can vary greatly in different contexts.

Standardized testing alone tends to focus on specific language skills and may not reflect a student's true proficiency, especially if the tests do not align well with the student's experiences or language use. Similarly, relying on written essays or oral exams without additional contexts can provide a limited view and may not accurately assess an ELL's overall proficiency and communicative competence. Hence, the combination of informal assessments and observations offers a more holistic and accurate picture of an ELL's language development.