Hello this is my first thread about academics and I'm just saying help. Im in high school(obviously) I am taking geometry and biology I can't seem to score high on quizzes and tests its so hard for me I study I stay after school and I'm not getting results help

I think we lose our study skills because they are never really considered a part of our on going education.
It may be a lack of efficient study skills that is keeping your behind.
Here is a link I think you will find helpful.
Study Skills - How to Study

You should consider a tutor, my "ex" is a tutor and from discussions with her I find that a high percentage of students really improve their skills,

Studying doesn't really help because you can't teach yourself something if you don't know it to start.. my advise would be instead of staying after school to study, ask your teacher for some one-on-one help after school... let him or her go over it with you until you understand I did that after missign a week from strept throat