Could anyone check whether what I wrote here is grammatically correct? Thank you very much :-))))

1. The next exercise is reducing the given relative clauses. 6 students were pointed to go to towards the board and told to write down their answers each time. Then, their answers were checked with the whole class. Only 18 questions were answered and 7 werewas left unsolved as homework for students. At the end of the lesson, she reviewed four main cases wherethat reducing relative clauses are used.
2. He was really creative to brainstorm students’ knowledge about Marie Curie and then elicited what they wanted to know about her. This is a creative and interesting way to give students a reason to read.
3. AfterDuring the observation, I gained valuable experience. First, I learned how to teach a class of relatively low level of proficiency.