That's a good point, but an issue I will have to face when that time comes. Being accepted into school isn't a solution to my problem with the public education system, but a temporary out.
I do not necessarily have an issue with using proprietary software; I have an issue with being forced to use proprietary software. I do not think a valid comparison can be drawn to being forced into using a specific textbook. There is nothing "active" about a textbook unlike software. There is nothing hidden away from me that I am unable to see in the textbooks. Any biases or malicious activity will be visible and avoidable. In proprietary software this is not the case.
At quick glance this seems to be fantastic! Software like this is what brings out the great nature of open source. This project reminds me of the eye tracking system that gained popularity a few weeks ago.
I am an American high school senior and can say confidently that most American students are screwed over pretty extensively when it comes to the software they are forced to use.
I have several classes that require the use of proprietary software such as Google classroom, Microsoft silver light, and Adobe flash. On top of that I cannot even remember the last time I was given a document that wasn't a .docx.
It would be one thing if these tools were optional, but they are strictly required and students' grades do suffer if they choose to opt out of using them. In previous years I simply followed along in my windows VM, but after getting accepted to the university of my choice I've had enough. I have alerted all of my teachers I will not be using Google classroom, or complete any assignment that requires the use of flash, silver light, or any other proprietary software. Has my grade suffered? Sure, but now that I am securely in the school of my choice I could not care less.