Concept:Formative assessment is an ongoing process that collects evidence of learning during instruction. It involves students actively to improve teaching and learning.Explanation:Formative assessment should be done throughout the learning process, not just at fixed points. Regular collaboration with students helps them understand their goals and progress. It also lets teachers adjust instruction based on individual strengths and weaknesses. Standardised group tests are not suitable because they lack detailed individual feedback. While special educators may assist, all regular teachers should use formative assessment for every student. It is not limited to the beginning or end of a session; it must be continuous.Answer:C. regularly in collaboration with students.