A very specific search query!
: This is a textbook published by Santillana, a well-known educational publisher, focused on natural sciences for 1st grade students. The book likely covers topics such as biology, chemistry, physics, and earth sciences. A very specific search query
: The 9th edition implies that there have been previous versions of this textbook, and the publisher has made updates and revisions to the content over time. a well-known educational publisher