HIZ Kütüphanesi, also known as Speed Library, is a mobile z-book application designed specifically for teachers. Developed by Hız Yayınları, this free app is exclusively available for teachers with a smart board membership. With this app, teachers can access a wide range of z-books on various topics, including science, history, and literature.

The app features an easy-to-use interface that allows users to search for specific z-books or browse through different categories. The z-books are interactive, featuring engaging visuals and animations that make learning more fun. The app also offers a bookmarking feature, allowing teachers to save their favorite pages for future reference.

Overall, HIZ Kütüphanesi is a useful tool for teachers who want to enhance their teaching methods and provide their students with interactive and engaging learning materials. However, it should be noted that this app is only available for teachers with a smart board membership, which may limit its accessibility to some users.