Perusall, a web-based collaborative reading platform characterised by its social annotation functionalities, was introduced in a postgraduate teacher-training language-awareness course in Hong Kong during the shift to online teaching and learning brought about by the global COVID-19 pandemic. Tasks were designed on Perusall to engage the…

The symbolic manipulation capabilities of computer algebra systems, which we refer to as CAS-S, are now becoming instantiated within secondary mathematics textbooks in the United States for the first time. While a number of research studies have examined how teachers use this technology in their classrooms, one of the most important factors in how…

There have been a great many good and varied textbooks in the history of education. For example, there was L.F. Magnitskii's "Arithmetic," L.N. Tolstoy's "Primer," and the Bible, which can also be thought of as a textbook. None of them is like the others at all. Each one is suitable for dealing with its own objectives in the…