Texas and California ensure that the majority of textbooks are just bland, period.
Those are big dog, major-population states that adopt textbooks at the state level (most states make textbook decisions at the school district level, others do use state-level adoption, but don't have enough population to have much market clout).
To sell well, a K-12 text has to a) not offend Texas and b) not offend California. Good luck with that.
Texas and California ensure that the majority of textbooks are just bland, period.
Those are big dog, major-population states that adopt textbooks at the state level (most states make textbook decisions at the school district level, others do use state-level adoption, but don't have enough population to have much market clout).
To sell well, a K-12 text has to a) not offend Texas and b) not offend California. Good luck with that.