Retired Engineering Manager with limited consultation
Traditionally math and science are the foundations of engineering. Math such as algebra, differential equations and calculus are important tools you will use to solve problems. Sciences such as physics, chemistry and some specialty like life science help you understand how things work. Also look for some cources in the field you are interested in, for example staics and dynamics if you want to go into mechanical engineering. But don't undrestimatre the importance of Language Arts. You will read and communicate a lot. Writing papers on your ideas, project updates and plans of projects are key tools in sharing information. Learning to make presentations and present to an audience is also useful. School councellers are a good resource for course information also. Good luck.