This document discusses the use of clines in language teaching. It begins by defining a cline as a scale of language items that goes from one extreme to another. Some examples of clines provided are from positive to negative, or from weak to strong. The document then provides reasons why clines are useful tools for language teaching, such as conveying meaning visually and highlighting shades of meaning. Finally, it gives some ideas for how to use clines in the classroom, such as creating a cline on the board and having students place language expressions along the scale.