To unlock The Student... trophy in Titanfall 2, you will need to complete the Gauntlet tutorial in under 56:56.
This should be relatively straight forward to achieve, and most people will likely complete the challenge quicker, especially considering there is a second trophy for completing the Gauntlet in under 33:65 seconds.
If you're struggling with the time, check out
Sodernaut's guide for ...Becomes the Master below, which offers tips some extremely helpful tips and a video.