General Interactions:
Many undergraduate students find various aspects of university life stressful; and some experience circumstances or personal difficulties that lead to noticeable distress. Perhaps because they see the TA as familiar and approachable, some students will express their concerns to you.
TAs can help by simply listening in a caring and attentive manner, letting them know you understand what it is like for them, and perhaps helping them figure out what they will decide to do. Focus on listening and providing information, but let them make their own decisions.
How will I recognize a learning disability?