This is a great time to start developing your listening skills. Your college ensemble probably sounds a little different than the groups you'll hear everyday. How so and why? Diagnosis of balance, intonation, tone, articulation, etc. issues is only the beginning of the process. Being able to provide effective and concise feedback is where a master teacher will truly shine. Again, don't be afraid to ask for help from your master teacher.
Congratulations on getting to this next step in your journey. I hope you have a positive student teaching experience.