let grass grow under one`s feet
to be idle, to be lazy, to waste time
The musician is always working hard and never lets grass grow under his feet.
Ideas To Improve Student Motivation
Give students a sense of control
While guidance from a teacher is important to keeping kids on task and motivated, allowing students to have some choice and control over what happens in the classroom is actually one of the best ways to keep them engaged. For example, allowing students to choose the type of assignment they do or which problems to work on can give them a sense of control that may just motivate them to do more.