What is Braithwaite's impression of the Greenslade School in To Sir, with Love?

When Ricky Braithwaite first arrives at the Greenslade School, he is disgusted by the weeds and garbage in the East End neighborhood where the school is located. When he first tours the school, at the insistence of the headmaster, Mr. Braithwaite is taken aback by what he calls the students' "careless, unscholarly attitudes" (page 14). He calls the scene "soiled and untidy" (page 14), as the girls dress in too-tight sweaters and hair-dos that recall those of their favorite actresses, while the boys wear jeans and t-shirts for the most part. He thinks to himself that the school does not resemble the neat, orderly vision he has of a school but instead looks like a "menagerie" (page 14). When he goes outside, he finds the courtyard dark and depressing, unlike the school where he spent his sunny childhood in British Guiana. He notices that the children shove and push each other with a definite lack of respect, and he wonders if they have the same enthusiasm for school that he had growing up.