A "textbook series" refers to a collection of educational books that are designed to be followed in a specific order to teach a particular subject or course. Full definition
In the Japanese textbook series we often use in Lesson Study work, fractions are introduced in the context of linear measurement, as fractions of a meter. (lsalliance.org)
Many of these resources allow the teacher to incorporate the technology without compromising their current teaching priorities or their core textbook series. (4aplus.com)
«We adopted a whole new textbook series in the math department. (npr.org)