in this passage Is there any proof offered that the teacher could not control his classes?

Question

TEACHER SACKED IN ALL-FAIL STORM
ROB MITCHELL’S thirty 16-year-old pupils were upset when they all failed their GCSE English exam at the Newton Magna Comprehensive School.
Local Education chiefs were even more surprised, and in a shock swoop yesterday, sacked Mitchell.
Bearded, leather-jacketed Mitchell(22), a member of Heysham Young Marxist League, was last night planning an appeal at the Young Street flat which he shares with youth leader Ted Harvey(27) and art student Nike Sontag (19).
‘The pupils both enjoyed and benefited from my lessons,’ he claimed,’ this is all a dreadful misunderstanding.’
One of Mitchell’s pupils, blonde, 16 year old Cheryl Sprockett said: ‘He was great. He didn’t shout at you like some of the other teachers. His lessons were fun.’
Mitchell’s lessons were chaotic, said a parent. ‘The children did as they liked.’
Damage to classrooms at the school is extensive.

Answer 1

No. None at all that I can see.

You have one instance of a third party stating that the classes were chaotic, but there is no quote on this and that "the children did as they liked". Neither of these stands as any 'proof' that he could not control his classes.

The final statement includes a reference 'damage' which may indicate violence, but also does not show proof of any missing control on the part of Mitchell. The article is remiss in stating that there is damage and NOT indicating what caused the damage more succinctly. And, even if the statement included such references it would still have to PROVE that there is a lack of control by Mitchell in the damaging of the classroom. If anything, the statement seems to indicate that the UPSET STUDENTS (mentioned in the first line) did damage to the classroom because of their not passing the GCSE rather than any lack of control by Mitchell.

Answer 2

The statement 'Damage to classrooms is extensive.' If that is actually true, how did the damage happen if it wasn't the students?

Also, the instructor failed in his duties as a teacher if all of his students failed this particular exam.