what can mr Samec do to make science class more interresting, or successful?

Mr. Samec is a great teacher, and has taught us science descriptively with vivid demonstrations, and tries to have the grade eight classes interact during lessons. But somehow, all the science classes got an averge lower than 70% average. Still, after a huge review session, the average marks were still extremely low. Why did the classes not get a descent average, after all the work done before the tests and activities? Is his class not interactive, or interresting enough? I think that our class understands the basic areas in the science unit that we had our first test on. I just think that our grade is just not used to the format and questions given in the tests. I don't think that the class is used to 'stretching' the knowledge that is already known, so this is partially the reason of why the mark average of the grade eight science test had been extremely low. Since the grade eights are not very prepared for the tests given, I think that we should have class done quizzes that don't count for marks, then gradually changing to quizzes that count towards our marks. This would help the students understand what the test could resemble, and be more prepared for the tests. This could also help reassure the students,(when pressured by the on coming tests.) Another thing that I realized, for math homework, truthfully,I hadn't finished all my homework for parts of the weeks in September. For some people, this could also be a problem, as it was for me in the first month of school. I think that giving a small penalty for unfinished homework would be appropriate, or giving seatwork of what the topic of the homework had (that they had not finished). Giving the student work to do would make the student do what they were supposed to do, and would know the information better. But on the negative side, students should not have teachers chasing them and forcing them to get good marks. This could be a little bit 'over the top' in some teachers' opinions. Lastly, if there were some after school days where people could come and work,ask questions, or review parts of the material, (an established date) would convince people/students to come and ask for help. Acing an established date would ensure that they could get help. Usually, this could convince students to come, instead of an open invitation, or coming to ask questions on their own. To conclude,since the grade eights are not completely used to the tests and material, I think Mr. Samec should give previous tests to prepare the students, as quizzes. I think this should not be counted for marks, but as a sneak peak into the science test. Sometimes, unfinished homework could affect the understanding to the concept being learned, so I think the students should have penalties ( such as detention, homework, or loss of points). I also think that having a club for talking about the subject after school could help the students who want to get help. Other than the information noted above, I don't think that Mr. Samec needs to do any more!