Santillana, una de las editoriales más grandes de Latinoamérica, ha transformado sus libros de texto tradicionales en . Para Ciencias Naturales 7 (7.º de primaria) esto significa:
Santillana is a major publishing house. Their textbooks are protected by copyright. While schools purchase physical copies, distributing the full digital PDF or the teacher’s solution guide for free on the open web is a violation of intellectual property rights. Therefore, direct, official links to free solution manuals are rarely available to the public. Santillana, una de las editoriales más grandes de