What is the ruling on selling pre-designed pamphlets for students to write in, given that the students themselves fill in the content?

A person is rewarded for their eagerness to consume what is lawful (halal), and the best of religion is piety. Designing brochures for female students has details:

- If the student is only required to write the content, then there is no harm in making and selling the brochures.

- If the student is required to produce the brochure herself for training purposes, then it is not permissible for anyone else to make it for her.

- If the matter is not explicitly mentioned, then it is apparent that it is permissible.