Items sent to, from or between educational organizations may be sent as what type of mail?

Items sent to, from, or between educational organizations can be sent as Library Mail, which is specifically designed for the mailing of books, educational materials, and periodicals among recognized educational institutions. This type of mail allows for a lower postal rate for educational materials that are sent in bulk, making it an efficient and economical option for schools, colleges, and libraries.

Library Mail is distinct in that it is intended exclusively for educational materials, which aligns with the context of the question focusing on educational organizations. This benefit encourages the exchange of knowledge and resources among educational entities, fostering a supportive academic environment.

In contrast, Media Mail might also seem applicable, but it encompasses a broader range of items beyond just educational materials and can include things such as DVDs or CDs. First Class Mail is suitable for a wide variety of mail types, including letters and parcels but does not have the specific focus on educational content that Library Mail provides. Parcel Select is used for shipping larger packages but is not tailored for educational materials, thus making Library Mail the most appropriate choice in this context.