Department of education should have an equivalent of "Bell labs" developing open source educational tools. The private market may be more efficient, however that includes the science of marking up prices which is a frivolous expense to tax payers and invites corruption of the acquisition process.
An example would be mass produced replacement/retrofit "desk" tops with an LCD screen built in to it under a glass plate. Glass plate would be a consumable replaced as it get's scratched.
The actual wood can be made from bamboo. A CNC router could whip up such a thing for virtually nothing, and the LCD bracket can be made from sheet metal for pennies.