Curriculum development is influenced by a number of societal and cultural factors.
I would concur with that statement. School funding is driven by taxpayer dollars, which in turn, trickle down to school budgets for curriculum development or revision. If society is facing an extreme economic downturn, it is likely that curriculum development budgets will be slashed and badly needed updates to curriculum, curricular materials, technology and yes, textbooks will remain unchanged or postponed until the economy improves. You can find evidence of students in poor urban districts being forced to use damaged ...
Various elements that impact curricular decisions are overviewed.