Straw Tower Challenge - MIDDLE SCHOOL - STEM Engineering

Challenge teams to build a freestanding straw-and-paper-clip tower that holds a 100 g load for thirty seconds. Planning, testing and reflection prompts help students explain which design choices improved stability.
Grades
Grades 6–8
Pages
9
File type
Multiple File Types
Answer key
Included

Updated Feb 12, 2024

Subject
Science
Topic
Straw tower, Engineering design
Resource types
Projects, Activities
Answer key
Included

Product description

From the author

Straw Tower STEM Challenge for Middle School Students.

My Straw Tower Challenge is an excellent way to get your students excited for STEM in an engaging hands-on way. It also is a great way to introduce them to the world of engineering.

This activity is designed for Middle School students.

In this activity, students will work in groups to design and build a freestanding tower using only straws and paper clips. Their goal is to build a tower that will be tall and yet stable enough to hold a small weight at the top.

By doing this activity, your students will experience the process of creating something new as they brainstorm, plan, design, and test their ideas.

This challenge allows students to apply what they're learning in science and math classes, including geometry, physics, material science and more as they problem-solve to create a strong, stable tower using only simple materials. Additionally, they will develop critical thinking, creativity, communication, and collaboration skills while working in a group setting.

Your STEM Challenge comes with:

  • A full set of instructions

  • Reflection questions

  • An explanation on the science behind the challenge

  • Instructions on creating their design

  • Tips for getting started on the challenge

The Straw Tower Challenge is an activity your students will enjoy. It will allow them to:

  • explore how shapes and structure affect stability.

  • learn principles of weight distribution.

  • use the engineering design process.

  • develop perseverance, resourcefulness and an ability to learn from setbacks and mistakes.

This activity is easy to implement with step-by-step instructions and is adaptable to different learning styles and abilities as you can customize it however you like to suit your students. It encourages students to embrace productive failure and to work together to create something tangible.

In the classroom

Teaching tips & learning objectives

Learning objectives

  • Design and build a free-standing structure that carries a 100 g load for at least thirty seconds using only fifty straws and a hundred paper clips

  • Work through the full engineering design cycle named in the file — brainstorm, plan, build, test, refine — inside fixed time limits

  • Explain how balance, weight distribution and the shape of the structure determined the tower's height and stability

Teaching tips

  • Make the 100g weights before the lesson and keep them uniform; the Teacher's Guide offers coins, a small bag of sand or rice, clay or Play-Doh, standard laboratory weights, or a Lego build weighed on a kitchen scale

  • Have a ruler or measuring tape ready for the final evaluation — height is one of the three judged criteria and is measured only after the tower holds the weight for thirty seconds

  • The Teacher's Guide suggests displaying the finished towers with each group's name and height for the school to see, which gives the measurement step a purpose beyond scoring

Skills covered

  • Engineering design process — students brainstorm, sketch a blueprint, build, test with the weight and then refine, with each stage given its own time allowance in the instructions.

  • Structural reasoning — the science briefing sets out why triangles and pyramids hold their shape while a rectangle deforms into a parallelogram, and students apply that when choosing a tower form.

  • Working within constraints — only fifty straws, a hundred paper clips and teacher-provided scissors are allowed, so a design that needs anything else has to be rethought.

Good to know

Questions teachers ask about this resource

What exactly are students allowed to build with?

Straws and paper clips, and nothing else. The rules state the tower must be constructed using only the provided straws and paper clips, that it must stand free of any support other than its own base, and that students may alter the materials with their hands using no tool except the teacher-provided scissors. The 100g weight and a ruler or measuring tape are supplied by the teacher for testing and measuring.

How can a uniform 100g weight be put together without laboratory equipment?

The Teacher's Guide gives five routes: a counted number of coins, a small plastic bag or pouch of sand or rice adjusted to weight, a lump of modelling clay or Play-Doh, standard laboratory weights where a set is available, or a small Lego structure built to exactly 100 grams on a kitchen scale. The guide stresses making them uniform across groups so the towers are comparable.

How long does the build itself take?

The instructions time each stage: 15 to 20 minutes to brainstorm and sketch, 25 minutes to build, 5 minutes to test the weight and measure the height, and 5 minutes to refine and retest. That comes to roughly fifty to fifty-five minutes before the reflection discussion, which the Teacher's Guide places after the challenge.

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Resource details

Concepts & topics

Core concepts

  • Engineering design process

  • Structural stability

  • Center of gravity

  • Load distribution

  • Forces

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