Almost all of the devices will use a micro-SD card for expandable storage. However, this is not the best choice for computers that would have enough space for full size SD cards. In order to negotiate with files on the micro-SD card to insert into the computer, they will use the SD card adapter. As they finish school, they are more likely to come across more SD cards as this is the standard for the nation, therefore replacing the old floppies from long ago.
Rationale
Students are being taught to interact with the world. SD cards are a standard that is more supported than micro-SD cards. However, due to size constraints, many devices provided to the student is micro-SD. This is not very convenient, but a necessary tool to compete within the global stage. Teaching them to use the SD cards is just a part of the education system. If the student should enter a government job after graduation, they will definitely deal with SD cards since this is the only acceptable format for moving offline files from one computer to another.