# Measurement

TLDRThe GeoGebra webinar focuses on new educational resources for measurement in math, including area, perimeter, circumference, volume, and surface area. Guest Katie Sinclair, an instructional designer, showcases interactive activities like calculating areas of quilt patterns and visualizing circle areas. The session highlights the use of GeoGebra's tools for teaching and learning, with practical classroom applications and exploration questions to deepen mathematical understanding.

### Takeaways

- 🌐 The webinar introduces new GeoGebra resources for measurement in education.
- 👩🏫 Katie Sinclair, an instructional designer and former math teacher, shares insights on the design and use of these resources.
- 🧩 The resources include interactive activities for calculating area, perimeter, circumference, units of measurement, volume, and surface area.
- 🎨 A quilt pattern activity illustrates calculating the area of composite figures, making math engaging and relatable.
- 📐 An interactive explores the area of a circle by transforming it into a parallelogram, helping students visualize the formula derivation.
- 🔍 Conversion between units of measurement is practiced with sliders and equations, enhancing understanding of measurement systems.
- 🔄 Exploring surface area and nets of 3D shapes like cylinders helps students grasp geometric concepts in a practical way.
- 📝 The applets are designed to focus on deep learning rather than just performing calculations.
- 📉 Practice resources include formative assessments with feedback and hints to reinforce learning.
- 📚 The webinar provides a QR code for accessing additional resources and slides for educators to use in their classrooms.
- 📅 The resources are timely for events like Pi Day, encouraging fun and educational celebrations in math classrooms.

### Q & A

### What is the main focus of the GeoGebra webinar series?

-The main focus of the GeoGebra webinar series is to introduce new GeoGebra resources released for the school year, with a particular emphasis on measurement topics such as area, perimeter, circumference, units of measurement, volume, and surface area.

### Who is the special guest in the webinar on measurement?

-The special guest in the webinar on measurement is Katie Sinclair, an instructional designer who has worked on the GeoGebra project, creating hundreds of resources on the website.

### What is Katie Sinclair's background in education?

-Katie Sinclair used to be a math teacher for middle school and high school. She has been in education technology for over a decade, working on creating educational games, interactive online textbooks, and various math-related online interactives.

### What is the purpose of the quilt pattern activity discussed in the webinar?

-The quilt pattern activity is designed to help students calculate the area of composite figures. It uses a quilting metaphor to make math engaging and allows students to visualize composite shapes as they click on different patches, revealing the underlying unit squares and triangles.

### How does the circle area visualization activity work?

-The circle area visualization activity allows users to manipulate a circle divided into parts and animate it into a parallelogram. This helps students understand the formula for the area of a circle, \( \pi r^2 \), by showing the transformation and the relationship between the circle and the resulting parallelogram.

### What types of questions are included in the exploration activities?

-The exploration activities include open-ended questions that encourage students to think about the process of math rather than just the final answer. They prompt students to consider how quilters might calculate fabric needs or to make connections between parallelograms and circles.

### How does the unit conversion activity help students understand measurement systems?

-The unit conversion activity allows students to explore converting between different units within a measurement system, such as centimeters to meters or millimeters to meters. It also enables them to convert between different systems, like feet to miles, helping them understand the relationships between units.

### What is unique about the surface area of cylinders activity using nets?

-The surface area of cylinders activity using nets provides a 3D animation that allows users to spin a cylinder and unfold it into a net. This helps students visualize how the surface area is calculated, with the formula being broken down into the areas of the circular bases and the rectangular side.

### Why are the calculations automated in some GeoGebra applets?

-In some GeoGebra applets, calculations are automated to allow students to focus on understanding key mathematical concepts rather than getting caught up in the mechanics of order of operations. This design choice helps students concentrate on the learning objectives and mathematical thinking.

### What is the goal of practice resources in GeoGebra?

-The goal of practice resources in GeoGebra is to provide assessment-oriented activities where students can apply their knowledge to solve problems. These resources offer multiple attempts, hints, and detailed solutions to reinforce learning and provide immediate feedback.

### How does the 'Invisible Cubes' activity help students understand volume?

-The 'Invisible Cubes' activity challenges students to calculate the volume of a 3D shape presented from a 2D viewpoint, encouraging them to visualize the entire shape and understand that volume includes space not immediately visible. It helps develop spatial reasoning skills.

### Outlines

### 📚 Introduction to GeoGebra Measurement Webinar

The paragraph introduces a GeoGebra webinar focused on new measurement resources released for the school year. The host, Monique, welcomes participants and introduces Katie Sinclair, an instructional designer who contributed to the project. Katie shares her background as a math teacher and her experience in educational technology. The webinar aims to explore how these resources can be utilized in classrooms, with a focus on measurement topics like area, perimeter, circumference, units of measurement, volume, and surface area. The host encourages participants to introduce themselves in the chat.

### 🧩 Exploring Area with Quilt Patterns in GeoGebra

Katie demonstrates a GeoGebra resource inspired by quilting, which helps students understand calculating the area of composite figures. The resource visually breaks down quilt patches into shapes like triangles and squares, allowing students to calculate areas and update totals in a table. This activity is suggested as a supplementary tool for hands-on classroom activities, such as designing quilts or using blocks to create composite figures. The resource also includes open-ended questions to encourage students to think about the mathematical process rather than just the final answer.

### 📐 Converting Units and Visualizing Circle Area

The discussion moves to unit conversion and visualizing the area of a circle. A GeoGebra interactive allows users to manipulate the number of parts a circle is divided into and animates the transformation of a circle into a parallelogram. This helps students understand the area calculation of a circle and make connections between different geometric shapes. The resource also features questions that prompt students to think critically about the formulas and their origins, rather than just performing calculations.

### 🔍 Deep Dive into Surface Area with 3D Nets

Katie showcases a GeoGebra interactive for calculating the surface area of cylinders using 3D nets. The resource includes a 3D animation of a cylinder unfolding into a net, with formulas and calculations displayed. Students can replace variables with actual dimensions and see the calculation process. The focus is on understanding the relationship between the net, the formula, and the dimensions, rather than just performing calculations. The resource also includes related activities and prompts for further exploration.

### 📉 Practice Resources for Measurement Concepts

The webinar highlights practice resources in GeoGebra that are more assessment-oriented, with correct answers, multiple attempts, and hints provided. Examples include calculating perimeter using expressions and models, and estimating liquid volumes with visual aids. The resources aim to provide a deeper understanding of concepts through interactive exploration and feedback. The hints and solutions within these resources are designed to guide students towards understanding the concepts rather than just finding the correct answer.

### 🌐 Invisible Cubes and Estimating Volumes

Monique presents a GeoGebra resource designed to help students understand volume in 3D space, even when not all dimensions are visible. The resource challenges students to calculate the volume of a 3D shape represented on a 2D screen, requiring them to visualize the entire shape. Students can input their calculations and receive scaffolding in the form of visible grid lines to help with their understanding. The resource aims to reinforce the concept of volume through low-stakes practice and visualization.

### 📝 Wrapping Up and Accessing Resources

The webinar concludes with a summary of the resources covered and a QR code provided for participants to access slides and links for further exploration. The host reminds viewers that the recording will be uploaded to YouTube and encourages feedback. Katie's social media handles are shared for those who wish to connect or ask further questions. The webinar aims to equip teachers with resources to celebrate Pi Day and enhance their students' learning experience.

### Mindmap

### Keywords

### 💡Webinar

### 💡GeoGebra

### 💡Measurement

### 💡Instructional Designer

### 💡Resources

### 💡Area

### 💡Perimeter

### 💡Circumference

### 💡Units of Measurement

### 💡Volume

### 💡Surface Area

### Highlights

Introduction to the GeoGebra webinar series on new educational resources.

Special guest Katie Sinclair, an instructional designer who contributed to the project.

Focus on measurement topics such as area, perimeter, circumference, units of measurement, volume, and surface area.

Live exploration of GeoGebra classroom tools for teaching measurement.

GeoGebra homepage and resources update introduction.

Exploring the area of composite figures using a quilt pattern.

Interactive activities that allow students to click and reveal different shapes within a quilt pattern.

Discussion on translating activities into real-world applications like quilting.

Introduction to an activity visualizing the area of a circle using Pi.

Manipulating the number of parts in a circle to understand area calculation.

Exploring unit conversion within a measurement system.

Using drop-down menus to switch between different units of measurement.

Activity on calculating the surface area of cylinders using nets.

Animations and interactions that help understand the formula for surface area.

Importance of focusing on mathematical thinking over mere calculation.

GeoGebra's approach to designing interactive learning objects.

Practical examples of how to use GeoGebra in classroom settings.

Highlight of the 'Invisible Cubes' activity designed to understand volume in 3D space.

GeoGebra's approach to scaffolding learning through dynamic system visualization.

Access to additional resources and the offer to celebrate Pi Day with GeoGebra.

Information on how to access the webinar recording and additional materials.

Invitation to follow GeoGebra on social media for updates and resources.