By using latent profile analysis eight stable and interpretable subgroups of readers were identified. The basis for subgrouping was different performance measures with four aspects of reading in focus: reading of continuous texts, reading of document texts, word reading and reading speed. Participants were 9-year-old Swedish students included in…

We have investigated how chemistry textbooks use models of redox reactions in different subject areas, how they change models between and within the topics, and how they deal with specific learning difficulties identified in the literature. The textbooks examined were published for use in the natural science programme in Swedish upper secondary…