A cup for sharp pencils and a cup for dull pencils. By having this, students will not be sharpening pencils all the time. When their pencil gets dull, they just get up, put it in the correct cup, and grab a sharpened pencil to continue their work.
A really cute idea for the front of the classroom. If a teacher provides students with pencils, it will be important to prevent any behavior issues by supplying students with working supplies. If students are up and moving around it is simply a distraction.