Someone who is serious about a career as an aerospace engineer should  not be shying away from taking classes in science and mathematics while  in high school. Classes in Biology, Chemistry, and Physics will help you  become grounded with an introductory understanding of the sciences,  which are going to be covered in greater depth during an undergraduate  program in aerospace engineering. Similarly, mathematics classes like  geometry, trigonometry, algebra, and calculus will give you the  fundamentals that are needed to succeed in an aerospace engineering  career.