In the paper we discuss previous results of empiric research of students- assistants’ feelings at their lessons. The teacher’s feelings are one of main factors providing success of the pupil’s work at classes. The author analyzes creative written reports by students of different specialties – Physics, Russian language and literature, Physical training – and detects general and specific factors influencing on teacher’s feeling. The universal hindrances for all specialties are connected with the students-assistants’ status and few experience, and also with the pupils’ mental condition at the students’ lessons. We register the differences of reports’ composition by students of the different specialties and especial situations influencing on studentsassistants’ emotions and connected with specific character of their school subjects.