A free download of the software is available as follows:
http://openproj.org/
It is a Learning Outcome (L.O.1) that students' need to strive for
"Plan and identify the building projeect; Sequences, resources, and Timelines"
I'd suggest that the above free software may be a good starting point in achieving this requirement.
I will do a timeline but may not fully reveal the project info to my students.