Clines are gradients that are used for teaching and learning shades of meaning. Words are spaced along the gradient. For example, English uses a range of words to describe temperature, such as: 'tepid', 'intensely cold', 'hot', 'boiling', 'cool', 'cold', 'warm', 'chilling' and 'freezing'. After modelling the task these words can be given to groups of students to place on the cline from the highest to the lowest temperature. The discussion that comes with this task is as important as the task itself.Cline Example from ESOL Online.