How to Fit Your Body Through an Index Card - Steve Spangler (2024)

How Does It Work

A standard 3×5-inch index card has an area of 15 square inches and a perimeter of 16 inches. No big deal, right?

But here’s the twist: cut that card into a 1/4-inch chain and the area stays put at 15 square inches. The perimeter, however, jumps to an astonishing 120.5 inches! The surface area of the card never changes, so the width of the ring directly impacts the length.

So what’s the lesson here? You can dramatically change the perimeter without touching the area. It’s a fantastic, hands-on way to get kids thinking about the difference between area and perimeter. Turn that humble index card into a math adventure.

Remember… by carefully cutting the index card in the pattern above, you are redistributing the entire surface area across the length of the ring, all while keeping the surface area connected. The closer together you make your cuts, the longer the ring will be.

How to Fit Your Body Through an Index Card - Steve Spangler (2024)

FAQs

What is the index card method? ›

The Index Card Method is a straightforward and versatile technique for organizing notes and thoughts using index cards as the primary tool. Each index card represents a single idea, task, or piece of information, allowing for easy rearrangement and reorganization.

What is the index card challenge? ›

🗝 A creative challenge —> not an art competition. 🌈 Create something on an index card each day for 61 days. 📇 Start with a 100-pack of index cards (ordinary, analog, paper, the kind you find at an office supply store). I use these lined cards and index card dividers. Gridded cards are thin but great for drawing ...

How to do the index card date challenge? ›

To play this game, couples can create flashcards with different date ideas or activities written on them. The flashcards can include anything from trying a new restaurant, going on a hike, or having a game night at home. One person would randomly select one of the two cards for a date.

How do you use index cards effectively? ›

On the front of each index card, write an answer or an explanation for the question or term. on the back. Use your notes and text for a reference, but put the answer or explanation in your own words whenever possible. Shuffle the index cards so you can't figure out any answers based on their location in the deck.

Why do people use index cards? ›

Index cards are used for a wide range of applications and environments: in the home to record and store recipes, shopping lists, contact information and other organizational data; in business to record presentation notes, project research and notes, and contact information; in schools as flash cards or other visual ...

What is the index card Tower challenge? ›

• The challenge: Can you build a stable structure using index cards, in order to display a small stuffed. animal (or, hold a bag of beans or pennies)? • The criteria: - the structure must be as tall as possible. - it must be freestanding.

How do you flatten an index card? ›

Iron the cards repeatedly until flat.

Once you've secured the cards under the heat-safe cloth, you're ready to iron. Move your iron back and forth across the bent cards to evenly spread the heat. After about thirty seconds, remove the cards from under the cloth to check their progress.

How do you make an index card in math? ›

At the top of the blank side (front) of the card, put the word or formula to be learned. 3. On the lined side (back), write the definition or whatever you want to associate with what is on the front. Integers that are next to one another in counting order, such as 8, 9, 10 or 34, 35, 36.

What is the index card match strategy? ›

Index Card Match Strategy is a method for teaching reading comprehension. Index Card Match is an example of active learning; active learning involves students in content in ways that foster competencies and skill-building rather than merely knowledge transfer.

What is a flash card date? ›

Date Night Roulette (sometimes referred to as Date Night Flash Cards) is a surprising and spontaneous way to plan a date night where one person blindly selects what you will do during your date. It is simple to play, easy to complete, and allows you to drop the whole back-and-forth of decision-making.

What is the index card method in teaching? ›

With a little planning, Index Cards can be used to assess student engagement and understanding, encourage participation and interaction, and improve retention and learning. Best of all, they're simple, affordable, and practical. Come and see how to use them more effectively in your own classroom.

What is the index card method in screenwriting? ›

The index card scripting method is a tool and process for visualizing your story. It's a method of laying out your ideas for a story before you start writing. You can always go back to review it once you've started and finished your actual writing to make sure it all still makes sense.

What is index method? ›

Definition and Usage

The index() method finds the first occurrence of the specified value. The index() method raises an exception if the value is not found. The index() method is almost the same as the find() method, the only difference is that the find() method returns -1 if the value is not found. (

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