Minor teleportation spells

During her introduction day all her classmates had been gathered in a classroom to be shown simple spells that can be very good to know as a student. The first of these spells were a spell of minor teleportation, very useful for forgetful students. The teacher looks out towards the students before bellowing out:

"Listen up students! This spell will save you so much time by LINKING two places together."

He gently tapped his desk with a pen creating a glimmering area, before opening the inside of a cabin with a similar result. He then reached into the cabin, and to Lydia's suprise, his hand went right through and came out of the desk!

"One of the many uses for this is to enchant the inside of you backpack with a larger container that you can keep at home, and then you can bring whatever you want anywhere!" the teacher waved his arm around expecting grand applauses, but what he recieved was students just whispering to each other. Lydia was way to astonished to hear what people were saying and instead she waited idle for instructions while the teacher continued:

"What you need to do is tap an object with something magical, strong wizard can use just their fingers, while thinking of the other object what you want to link. And when you do the same thing for the other object, the link is created. Afterwards just think about the two objects and clear your mind and the link will vanish."

All students started to practice the spell which created a pretty chaotic enviroment with glimmering tables, chair and everything between being linked. Lydia was getting the hang of it very quickly, linking so many places that she could throw a paper airplane at the blackboard and it would appear somewhere else just to fly into another linked object. This was amazing! She studied to blackboard carefully to make sure how to remember this, and she had a pretty good memory so it wouldn't be hard. After the class all students were suppose to be quiet for a couple of minutes and meditate, and slowly all the glimmering areas were disappearing, making it look like a normal classroom again.