“…Fifteen studies (19%) analyzed how students perceive, use, and understand the content of secondary, 12,21,56,61,67,70,72,74 general chemistry, [38][39][40]75 secondary and general chemistry, 64 organic chemistry, 16 and general and organic chemistry textbooks. 29 These studies used a variety of methods: surveys, 29,38,39,56,64,74,75 surveys and interviews, 16,21 and some tested student comprehension of the textbook content with assessments. 12,40,61,67,70,72 A subset of these studies examined student use of ebooks 38,39 or open educational resources (OERs).…”