Hi , just to let you know, the tutorials you've referenced in the curriculum aren't about Symfony3 but rather about Symfony4 development. Also, according to utopian.io, tutorials linked under the curriculum header are supposed to be yours:
Place here a list of related tutorials you have already shared on Utopian that make up a Course Curriculum, if applicable.
Best regards!
RE: Symfony Tutorial: How to Install Symfony Framework on Your Machine