It is enough at secondary level if the students can go through the curriculum books attentively. Exceptionally meritorious students can definitely refer other general books.
Curriculum books. A teacher can hone his or her own knowledge base with what is desired to be achieved in a specific curriculum, not to some general set of books. If the student can do both, more power to him or her. A weaker student can at least aim at what is required in a specific curriculum.
The primary source of knowledge are usually from the curriculum books but my father told me never to be content with the knowledge from them. I grew hungrier everyday for new knowledge from other general books... fictitious and non-ficticious books, newspaper articles etc. They have been very crucial to my academic development.
Definitely is the curriculum books. Because, these are the subjects at which are the students are examined with it, either as courses, mid, or in the final (standard). Nevertheless, uses of the general books may subjoin to the students knowledge.
To pass the exam, answer is of course curriculum books, but yes to broaden our imagination, thinking and analytical abilities, all other sorts of knowledge from print and electronic media do help in enhancing intellectual growth.
The textbook in each educational system is the practical embodiment of the elements of the curriculum, and the most widely used and dependable, so that it remains the basic pillar in the educational process of learning, inside and outside the classroom
Both i.e. curriculum Books as well as well as general books are important for to acquiring knowledge for secondary school students, but most important curriculum books to build their academic standard.