https://www.cambridgeinternational.org/programmes-and-qualifications/cambridge-igcse-9-1-computer-science-0984/endorsed-resources/
Cambridge IGCSE (9-1) Computer Science 0984
Learners following the Cambridge IGCSE 9-1 (UK only) Computer Science syllabus develop their understanding of the main principles of problem solving using...
1 computer sciencecambridge igcse9
https://openstax.org/books/introduction-computer-science/pages/1-labs
Ch. 1 Labs - Introduction to Computer Science | OpenStax
This free textbook is an OpenStax resource written to increase student access to high-quality, peer-reviewed learning materials.
introduction to computerch 1labsscienceopenstax