Understanding Place Value Disks on a Place Value Chart
Place value disks are a hands‑on tool that helps students visualize the base‑ten system. When the disks are placed on a place value chart, learners can see how units, tens, hundreds, and larger values combine to form numbers. This tactile approach aligns with research‑based strategies for early mathematics and is especially popular among the teaching community on platforms such as YouTube.
What Are Place Value Disks?
Each disk represents a specific value:
- Unit disk – one unit
- Tens disk – ten units
- Hundreds disk – one hundred units
- Thousands disk – one thousand units
Disks are usually color‑coded, making it easy for students to sort and group them quickly. The visual contrast supports second‑grade addition strategies and prepares learners for more abstract operations.
Setting Up the Place Value Chart
To start, follow these steps:
- Print or draw a chart with vertical columns labeled ones, tens, hundreds, and thousands.
- Place a small container at the base of each column for the corresponding disks.
- Introduce the chart by saying, “We will use these disks using a place value chart to build numbers.”
When the chart is ready, you can demonstrate how to build a number such as 342 by placing three hundred‑disks, four ten‑disks, and two unit‑disks in the appropriate columns.
Classroom Strategies That Leverage the Chart
Teachers worldwide share videos that show the chart in action. In one popular video, the narrator says, “In this video we explore how to add two‑digit numbers with place value disks.” The following strategies are commonly used:
- Decomposition – Break a number into its place values before performing operations.
- Regrouping – Exchange ten unit‑disks for one ten‑disk, reinforcing the concept of carrying.
- Algorithm practice – Align the disks with the traditional addition algorithm to show why
