Lesson Plan

Creating Soccer Goals Using Pythagorean Theorem - Flipped Classroom

Creating Soccer Goals Using Pythagorean Theorem
Caitlin M.
Media specialist/librarian
Shorecrest Preparatory School
Saint Petersburg, United States
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My Grades 5, 6, 7, 8, 9, 10, 11, 12

Topics covered:

  • Pythagorean Theorem
  • Proportion, Measurement, and Area
  • Rotating Angles

Students will be able to…

  • Collaborate within a small group to construct a child-sized soccer goal using the Pythagorean Theorem.
  • Write a description of the design-build process including a mathematical description.

Student learning goals include...

  • Constructing a child-sized soccer goal
  • Creating a 3D model of the soccer goal design
  • Creating a documentary video reflection and written reflection

This is a hands-on design project used to reinforce mathematical concepts. The flipped lesson components and project are meant to be completed over several days. The days are listed below at each step of the project and are calculated based on 80-minute blocks.

Note: For this lesson, students will be applying Pythagorean Theorem to build a soccer goal. Ahead of time, you’ll need to order materials for the project including cement, netting, and PVC. You’ll need a workspace (inside or outside) for students to use tools and build their soccer goals. Students will need 1:1 devices to complete this lesson.

Grades 9 – 10
All Notes
Teacher Notes
Student Notes


For your flipped lesson, create a video using Doceri and post to YouTube. In the video, Include an explanation of Pythagorean Theorem with a formal definition and several examples. Embed the video on the class Haiku page. Create a note-taking outline in Microsoft OneNote and make it available for students to download.

  • The Pythagorean Theorem is the relationship between the side lengths of what type of triangle?
  • What is the mathematical formula that explains the Pythagorean Theorem?
  • How can the Pythagorean Theorem be used to solve real-world problems?
Student Instructions

On your device, watch the Doceri lesson using either the Doceri app or YouTube link. Use the outline provided by your teacher in Microsoft OneNote to answer guiding questions, and take notes while watching the lesson.

2 CONTENT REVIEW (Class - Day 1)

Google Drive
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Provide students with a practice problem sheet via Google Drive using the concepts taught in the video. Give students time to work through the problems in class. Allow for discussion time and address any common misconceptions. Assign students to groups for the construction project.

Student Instructions

Work through practice problem sheet in class. Ask teacher for assistance as needed.

3 PROJECT PREP (At Home Pre-Day 2)

Now that students have an understanding of Pythagorean Theorem, they will be applying the theorem to create a soccer goal. Set out  materials for the project including cement, netting, and PVC. (Move students to larger space if necessary.) Share a link to the Autodesk Tinkercad YouTube tutorial playlist and This Old House video (soccer goal tutorial) on class Haiku page. Post project requirements and grading rubric.

Project requirements include:

  • Individual 3D design in TinkerCad
  • Group constructed child-sized soccer goal
  • Group reflective documentary using MovieMaker
  • Group demonstration of mathematical concepts use in project using Doceri
  • Individual written reflection on project
Student Instructions

Watch a This Old House video, which will show you how to build a soccer goal. Then, watch tutorial videos on YouTube and practice using TinkerCad using the site tutorials. In groups, start asking questions and project planning using a collaborative Padlet wall and share with your teacher. Also decide what each group member’s roles and responsibilities will be during the project. Some will be responsible for building, while others will be responsible for creating a video documenting the group's process. 

Construction phase roles and responsibilities:

  • Who will do the cutting and measuring of the individual components?
  • Who will create the written assembly instructions for the recipients of the child-sized soccer goals?

Reflection phase roles and responsibilities:

  • Who will film the project documentary?
  • Who will edit the project documentary?
  • Who will work on the Doceri demonstration video?


Today students will design a 3D model their group child-sized soccer goals using TinkerCad. Your role is to assist students in the design process and troubleshoot any software issues and/or assist struggling students.

Student Instructions

As a group on scratch paper, work through the mathematical equations to create a design plan. While the child-sized soccer goal will be built as a group, each student needs to complete an individual 3D design on TinkerCad.


Activity: Creating

Today students will be building their soccer goals. Start by demonstrating  the proper use of tools and safety procedures. Supervise and assist as needed during design and build phases.

Student Instructions

Complete construction of building the child-sized soccer goals, working collaboratively as a team and contributing based on individual roles and responsibilities decided upon earlier in the lesson.


Google Drive
Free, Paid
Free, Paid

Grade students based on rubric and provide feedback as necessary.

Student Instructions

Each individual student must write a reflection of the project. Each group must write specific assembly instructions. These documents can be created in Google Docs and shared via Google Drive. As listed in the project prep, student documentary videos and demonstration lessons will be completed and posted to a class YouTube playlist.