Versatility: the blackboard provided a blank canvas for any type of content.
Affordability: its low cost made it accessible to educational institutions at every level.
Durability: with proper maintenance, it could last for decades.
Simplicity: no technical knowledge was required to use it.
Its impact on classroom dynamics
The blackboard encouraged a teacher-centred style of teaching in which the teacher was the main source of knowledge. Students, meanwhile, took a more passive role, mainly taking notes and watching the explanations.