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Teachable Moments

Acoustic Doppler

Do you want even more accuracy in your CFS reading? If so, an Acoustic Doppler Current Profiler might be what you need. Here’s why.

Capturing Images

Movie making isn’t purely magic. There’s a lot of technology behind how cameras capture images, and we offer a brief explanation.

Chroma Key

Also known as “green screen,” chroma key isn’t just used by TV weather people. It’s also a great tool for creating special effects, as we explain here.  

Frame Rates

Different film frame rates are used for different types of entertainment. We build on our other two teachable moments from this episode with a quick explanation and overview.  

How Air Conditioners Work

This technology-based segment explains in simple terms the way refrigerant and evaporation combine to create air conditioning.

How Film Works

Before making films, we wanted to find out how films work. And that means learning about Persistence of Vision.


We again focus on technology, this time comparing incandescent lighting to LED lighting, learning how each works, along with the advantages and disadvantages of each.


The odds are pretty good that you've used metadata. So now is a good time to find out exactly what it is.


Well you can’t run an airport without radar. So we take a moment to learn the basics of how radar works.


We explore the field of nuclear medicine technology with an explanation of the two types of radiation and the important differences in them.

RFID Technology

Coca-Cola’s Freestyle drink machines use radio waves to communicate with suppliers, which makes them environmentally friendly, and more.


Once we’ve got a handle on radar, the next step is learning about transponders and why they work so well together.

Find By Season

This content was developed under a grant from the U.S. Department of Education. However, this content does not necessarily represent the policy of the U.S. Department of Education, and you should not assume endorsement by the Federal Government.