I'm not sure that you are correct, although when I was at Grammar School our Physics and Chemistry books were still teaching that "Matter can neither be created nor destroyed." at a time when scientists had already split the atom. Textbooks tend to deal with facts, whether in mathematics or sociology, when the students reading them are well aware that there are plenty of "facts" still to be proved or found to be untrue. Perhaps another factor is the cost of text books. Are they built to last, or is the school unable to fund more modern versions? A very good question!!
Because usually it is. Textbooks present information as if it were true because their purpose is to present correct and valid information. Incorrect information has no value in a learning environment, unless it is identified as such and is used to illustrate aspects of error.
only information agreed on by all historians
You can find online information about renting textbooks from iBook's or amazon. You can find online information about renting books by looking up on websites to find which books you want.
History textbooks present history as 'clean'. The textbook tries to make the United States and our heroes as never having done anything unpleasant, unheroic, or doing unethical deeds.
You can find online information about eBooks and textbooks on this website: http://www.textbooks.com/etextbooks.php . This website tells you exactly what each one is, and also gives examples of why you should choose them to normal books and textbooks. I hope this helps you.
To obtain information about Pearson education textbooks, visit http://catalogue.pearsoned.co.uk, which is an online catalogue where you can find a Pearson published textbook by category or discipline.
Primary sources include letters, pamphlets, and other documents from the time period. Secondary sources include textbooks, encyclopedias, and other items from the present that paraphrase information from primary sources.
its the present day iraq the area of the Tigris-Euphrates river system