Author:
Glenn Shelton, Carrie Robledo
Subject:
STEM
Material Type:
Activity/Lab
Level:
Lower Primary
Tags:
k5engineers
License:
Creative Commons Attribution
Language:
English

Education Standards

1: Three Billy Goats - Keva Plank Bridge

1: Three Billy Goats - Keva Plank Bridge

Overview

Students create an engineering project using Keva Planks based on the Folk Tale, Three Billy Goat Gruff. They have the following limitations. 

  • Only blocks

  • Span of river wider than the planks (span is 8 inches)

  • Not weight bearing

  • Can’t build on top of banks (the end of the river base/supports)

  • 15 minutes to build

Instructor Directions

Engineering Process

2nd Grade:  Three Billy Goats- Keva Plank Bridge

Driving Question / ScenarioHow can you build a bridge across a river with the fewest Keva Planks without touching the river edge for the goats to safely cross?
Project Summary(Problems?  Constraints?  Clarification?):
  • Only blocks
  • Span of river wider than the planks (span is 8 inches)
  • Not weight bearing
  • Can’t build on top of banks (the end of the river base/supports)
  • 15 minutes to build
Estimated Time60 -90 minutes
Materials / Resources2 Bags of Keva PlanksEngineering with Keva Planks (optional)Keva Planks Engineering Log  (optional)
StandardsScience- 1.E.2.2 Students know that soils have different properties based on where they are located on the earth. Students know that some soils retain more water, nutrients and provide better structural support than others and therefore enhance the growth and development of certain plants.ELA- RL 1.3Describe characters, settings, and major events in a story, using key details.
Project Outline
AskHow many Keva planks will I need to successfully build this bridge?  How high will this bridge need to be to make it across the river?  How can I use these materials to build a strong bridge?
ImagineRead a couple versions of the Folk Tale, Three Billy Goat Gruff.  Research pictures of bridges.  Let the students hold a few Keva planks to get an idea of how they can build with them.  Have them visualize what this will look like and discuss their ideas with their group. Decide on a 1st attempt/plan of action.
PlanUsing the planning doc or a sheet of paper have students draw and label the parts of their bridge.  Have the students write down the number of Keva planks that they think it will take to build this bridge.  Record this number on the following chart (under “1st Attempt”):
  • Keva Planks Recording Sheet to Keva Plank Number Totals
Create
  • Create your 1st attempt, as laid out in your plan. Use the exact number of blocks you planned to use.
  • Observe carefully and brainstorm with group what is happening to your design (good or bad!)
ImproveHow can you re-build a bridge across a river with the fewest Keva Planks touching the river edge for the goats to safely cross?
Closure / Student ReflectionsWhat worked well?  What didn’t work well?
Possible Modifications / ExtensionsYou could remove the river bank restraint.  An addition to restraints could be height requirements.  Research some famous bridges and brainstorm the materials used to build real bridges in the world.  Find the longest, shortest, tallest, oldest, newest bridge.  What shapes are seen on different bridges?  Build out of other materials

 

 

Sample Pictures / Video

 

  
Creative Commons