professores e substituições... modelos que [não] funcionam... nem por cá, pois são espaço para 'entreter' e 'guardar' os alunos nas salas de aula... sem objectivos educacionais, instrumentais e operativos...!

"In my experience, effective substitute teachers have been rare. If you criticize me for stereotyping substitute teachers in my introduction, know that they are all real people (names changed) who have taught classes I take. When I complained to my parents about substitute teachers, my dad commented defensively, "It's a thankless job with low pay and short preparation time." This is completely true. Substitute teachers are often called up on short notice, often with no prior experience with the class, and have myriad responsibilities -- taking attendance, checking off assignments, starting projects -- thrown at them. Teachers may leave incomplete or confusing lesson plans or none at all.

In most cases (except for that sub who surfed the web instead of doing anything), the substitute teacher's ineffectiveness is not from lack of trying. Rather, it is the result of lack of experience with or knowledge of the subject's curriculum. This is a problem that needs to be addressed by education administrators."

aqui.