Quantu is a learning platform based on channels. Content creators can create a channel and post learning content to it. Learners across the platform can subscribe to channels and study the learning materials available on them.
Every user has a personal channel
Every user has a learning "Desk" that shows how many challenges they have completed or challenges they have marked to attempt later.
Every channel has a list of challenges users can take.
There is an overview page (with pagination, like hacker news) where every user can see the newest challenges.