This Fluency Activity is a part of the Lesson 1, Unit 1, Grade 5. Place value disks are used as models throughout the curriculum and can be represented in two different ways. A disk with a value labeled inside of it should be drawn or placed on a place value chart with no headings. The value of the disk in its appropriate column indicates the column heading. A place value disk drawn as a dot should be used on place value charts with headings, as shown in Problem 1 of Concept Development. The dot is a faster way to represent the place value disk and is used as students move further away from a concrete stage of learning.