Tech Support (слэш)

For the prompt: Technology goes wrong. do with that as you will
Severus Snape has taught chemistry using a chalkboard for his entire career, so he is less than thrilled to be told he must use some sort of electronic white board instead. When he finds out the son of his childhood bully has been hired as tech support, he is sure he won't survive the school year. And yet Harry is nothing like Severus thought he would be, and he is forced to reconsider how he views his past, his educational philosophy, and even himself.