I'm trying to pursue a career in computer science and was wondering what is the best website to learn more about this subject?

I would look at the school's courses would help. If the courses are taught using Java or C++ that would be a good place to start. Learning a bit about the coding structure will allow you to focus on the course material rather than learning syntax. Udacity (https://www.udacity.com/) and Code Academy (https://www.codecademy.com/) are some good places to start. http://www.learnjavaonline.org/ and https://www.learn-cpp.org/ will give you some interactive experience as well.

The CS coursework is designed to teach you the basics and go from there, so there is not much you need to know beforehand in most schools. If there are some additional courses you are looking at, there are probably some online course that will teach you the basics before the class begins.

But the best tip I can give is to learn how to manage your time. If you can sit down and do your coursework you will have plenty of time to have a social life as well as do well academically.

To practice Coding : https://www.hackerrank.com
Lessons :Udacity etc
I would say look up subjects like data structures, object oriented programming, machine learning, and check out languages such as C#,C and Java. Ada and Fortran even.

http://www.cse.lsu.edu/

Nigel,

I don't know the what the "best" web site is, to learn abut computer science, but if i did, I would hesitate to give it to you.

Why?

Because you want to learn about computer science and a really good way to learn is to explore, absorb and to output.

So get on the internet, do some searches, and start exploring. Take notes of what you find and where you found it. Then after you have explored 3 or 4 of them, write an email to your favorite relative and include a summary of what you have found and what you have learned. Do a compare and contrast, both with how the web sites compare to each other but how they compare with what you were expecting to find. Repeat this with three or four more again and agan.

Do that for a couple of hours every day, week by week (7 - 10 hours per week) and by the end of the summer, you will be an expert on what web sites are out there that help kids learn about computer science. You will know a lot about computer science and you will know a lot about project management.

If you are able to stick with your exploration, your absorbing, and your written output to a relative of yours, pretty regularly, till the end of the summer, you will have proven you have the project management skills employers are looking for, and you will be well on your way to being a self-directed learner. That is important because you will need to continually learn to keep up with the latest advances in your profession.

I first learned how to program Fortran on cards in high school. In my college days, the Basic language still required line numbers and C# and Python didn't even exist. And I imagine that the advances will continue to come, much faster than they have been.

Good luck in your pursuits.