A single textbook is no substitute for a district plan that encourages the use of a combination of resources and provides teachers guidance on the order in which standards should be taught, how much time should be spent on them and how they fit in the larger context of the grade - to - grade buildup of knowledge. (edsource.org)
Instead of introducing several challenging new terms on a single textbook page, new terms are introduced one at a time. (apexlearning.com)