Correct Response: B. Portfolio assessment is an authentic, performance-based type of assessment that allows SEI teachers to monitor the progress of their students often and through multiple means. Portfolios can include a variety of indicators of student performance (e.g., student presentations, test data, checklists, exercise sheets, video recordings of oral work). Ongoing assessment through a portfolio system can provide snapshots of where students are throughout the school year and cross• checks on student progress, which allows the SEI teacher to target the social and academic language needs of individual English learners and adapt instruction accordingly. End-of-unit assessments (A), norm-referenced assessments (C), and culminating performance assessments (D) are all incorrect because they are various types of summative assessments rather than a system of formative assessment as described in the scenario.