televisions and scaffolds

In an exerpt from Kameenui and Simmons (1999) the purpose of a scaffold is to make sure a student "gets it" or masters the first learning step in order to achieve some independence in learning.
The purpose of a scaffold is then to remove it.
Somehow televisions aren't scaffolds; I find it hard to remove mine. On teachervision, a list for evaluating scaffolds is provided. Maybe some teaching methods make more dependent than others and are somehow more like my television.