One piece of technology you will need to be comfortable with in order to be successful in high school is the various Google Apps that are available to you. Not only will your teachers expect you to be proficient using these apps, but understanding how to use them effectively can help you to be successful beyond high school as well.
Use Google Drive to save/store EVERYTHING. Accessible anywhere you have access to the internet
Use Google Docs as your word processor to write papers, complete assignments, real-time collaboration
Use Google Slides to create presentations that you can easily share/edit with others
Use Google Sheets to create your own spreadsheets
Use Google Forms to create quizzes, surveys, and polls
There are many other Google apps that can be very useful to you as a student and in your future. The apps listed above are some that you will certainly use throughout your high school career, however, you may also want to familiarize yourself with Google Sites, Google Maps, Google Classroom, Google Translate, Google Calendar and many others.