Talk with the teacher or professor. Many educational professionals started teaching because they want to help students learn. Express the problems you're having and ask the teacher for some additional science help through either tutoring or some extra assignments.
Ask for a peer tutor if your teacher or professor does not have time to give you the level of science help you need. A peer tutoring program is often in place in some schools. You might also give your teacher a good idea to start a peer tutoring program for students like you who need additional science help.
Consult the resources of your university. if you're a college student, many universities have free tutoring services for more difficult subjects, including various science courses. This tutor is usually a peer who has mastered the subject and successfully passed the course more than once.
Get an outside tutor. Many tutoring agencies and private tutors are available to help with any science subject. Make sure the tutor has experience tutoring the science subject and is a proven expert, such as a former teacher. Interview the tutor ahead of time to make sure they're a good fit for your learning needs.
Request recommendations for supplemental reading or study materials for the science course you're taking. You can get recommendations from your teacher or professor, your peer tutor or the outside tutor you've hired.