OPAC
The Allen Road Elementary School library OPAC links materials to pictures (like you have seen in this iBuilder) as well as call numbers. The pictures seen on the OPAC match the subject of the book. This picture is just like a call number in that it gives a direction as to where the book can be found in the library.
The pictures you saw on the OPAC are also located at the end of the shelf where this subject is shelved. So... once you have found a book on the OPAC, follow the pictures to the area of the library where this book is shelved.
IMPORTANT: This just gets you to the correct area. From here you will need to use the call number to finish your search for the book.