Concept:Portfolio assessment is a systematic collection of student work that shows progress, skills, and understanding over time.Explanation:A portfolio contains samples like assignments, drafts, self-reflections, and teacher feedback. It helps monitor learning and encourages student self-assessment. This method is used by teachers to gather evidence of learning and then evaluate it. Option A defines this as "collection of instances of learning by the teacher and using it for assessment of learning." Options B, C, and D are incorrect because portfolio assessment is broader than just mixing formative/summative records or excluding either type. It is a purposeful collection for authentic assessment of learning.Answer:Option A