How to Throw a Knuckle Curveball

How to throw a knuckle curveball 
https://vimeo.com/40299467
https://vimeo.com/40299466

Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Be the First to Share

    Recommendations

    • Furniture Contest

      Furniture Contest
    • Reuse Contest

      Reuse Contest
    • Made with Math Contest

      Made with Math Contest

    Discussions