Formative evaluation is an ongoing process that occurs during the instructional period. Its primary purpose is to monitor student learning and provide continuous feedback to both students and teachers. This feedback is crucial for identifying areas where students might be struggling and for informing instructional adjustments.
Therefore, the correct answer is Improvement. Formative evaluation is used to guide and enhance the teaching and learning process in real-time. Options like Grading, Selection, and Certification are typically associated with summative evaluation. Summative evaluation takes place at the end of a learning unit or course to assess overall achievement and assign a final judgment, rather than to provide ongoing feedback for immediate improvement.