I am a teacher with a blog and a website to communicate important information (schedules, concert dates, helpful websites, etc) with parents and students. I'd like to create another platform to connect with parents and share pictures, videos, and audio files of the students performing. I need it to be invitation-only or sign-in required so the parents feel comfortable with the files being on the internet. My website is a Google Sites, but I really hate formatting on Google Sites and Wikispaces. It's a nightmare and I can never make things look the way I want them to.