Every classroom should have at least two pairs!
Note that scissors claiming to be designed for left- or right-handed cutting and scissors that advertise simply a grip for left-handed cutters Are Not Appropriate For Left-Handed Students. Neither is a right-handed pair of scissors turned upside-down.
The difference is in the overall design of the scissors. In addition to the comfort of the appropriately constructed grips for a left hand, the blade on left-handed scissors is set in a position opposite of the blade on right-handed scissors. Without this design shift, left-handed students must see over the blade while they cut. This is Difficult and Counterproductive.
Happy Cutting to All of Your ECE Students! :)