K-5 friendly lesson
Try one idea, then jump into the activity.These lessons are designed to feel short, friendly, and easy to follow.

Place Value models (Up to the Hundreds)

🧱 Let's build a giant tower! We have tiny Cubes for Ones, tall Rods for Tens... but what do we use for the Hundreds block?

Lesson 2

Concept

Our Base-Ten blocks are getting an upgrade. šŸŽÆ **The Giant Square Building Block:** * **Ones:** Tiny little cubes. (1) * **Tens:** A tall rod made of 10 tiny cubes glued together. (10) * **Hundreds:** A giant flat square. It is made of 10 long rods glued side-by-side! (Or 100 tiny cubes glued together!). We call it a "Flat". **Example:** How do we build the number **342**? 1. Look at the Hundreds (3). We need **3 Giant Flats**. 2. Look at the Tens (4). We need **4 Long Rods**. 3. Look at the Ones (2). We need **2 Tiny Cubes**. If a picture shows 2 Giant Flats, 0 Long Rods, and 5 Tiny Cubes... the number is **205**!

Try it

Read the blueprints! **Instructions:** Look at the description of the blocks and figure out what number it builds. **Problem 1:** The picture shows: 4 Giant Flats, 2 Long Rods, 8 Tiny Cubes. * Hundreds: 4 * Tens: 2 * Ones: 8 * Number: ___ **Problem 2:** The picture shows: 1 Giant Flat, 5 Long Rods, 0 Tiny Cubes. * Number: ___ **Problem 3:** The picture shows: 6 Giant Flats, 0 Long Rods, 1 Tiny Cube. * (Don't let the invisible zero trick you!) * Number: ___ **Problem 4:** The picture shows: 0 Giant Flats, 3 Long Rods, 9 Tiny Cubes. * Number: ___