Non-violence is the greatest Dharma; So too is all righteous violence.
'Idhuvum Kadandhu Pogum "
Even this challenging situation would ease
Don't sweat the small stuff and it's all small stuff.
Textbook mistakes are not crime but are the mistakes of serious nature. Text books are the source of information for the school children and any mistake in textbooks will have an adverse effect in the minds of students.
Though the publishers of text books are taking lot of care in correct proofreading of the books still some small mistakes remain there and create lot of embarrassment.
Though we should be careful in all types of writing but special care is required for educational books as they are the building blocks of our education.
Thoughts exchanged is knowledge gained.
It is always advisable to give a corrigendum at the end of the text book mentioning all the mistakes and correct word opposite that. That will give the student an advantage and he can get it corrected. As far as I know proofreading will be done twice during the printing. With this desk top printing the chances of human error also has came down.
Even they there may be some mistakes some times. For this the best solution is to advise the students in the classroom by the teachers regarding the mistake and correct version of that mistake. If this is done there will not be any problem afterwards.