What’s Possible with Green Screens in the Classroom


Listen to my interview with Justine Bruyère (transcript):

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Shilpa stands in front of a mountain range, arms extended. A few seconds later, she’s transported to a city street. Look again and she’s swimming in the ocean. Finally, she’s floating through outer space.

 
 

These rapid trips around the universe are happening thanks to the magic of green screen technology, and to take them, Shilpa never once left her classroom in Nashville.

Green screen technology (also known as chroma keying) offers so many engaging opportunities for students to learn.  It’s pretty easy to do, it can be done on a very low budget, it works in lots of subject areas and grade levels, and it’s even possible while teaching remotely. In my most recent podcast interview (listen or read the transcript above), I talked with teacher educator Justine Bruyère about the why and the how of green screen videos.

 
Justine Bruyère

How Do Green Screens Work?

A solid green screen is placed behind the subject of the video, which in many cases is a person. Once the initial filming has been done, special software allows the video editor to replace everything that appears green on the video with a still image or another video.  

This video explains the process:

 
 

Why Use Green Screens?

Far from being just a cool novelty, green screen projects have the potential to give students deep, creative learning experiences. Bruyère points out a few key characteristics that make projects that use this technology so special:

  • They generate embodied learning. When students put themselves into green screen projects—whether it’s to take on the role of a character in a book, a journalist, an investigator, or an explorer—their bodies and emotions are actively participating in the learning process, which deepens the learning. This mind-body connection is at the heart of the embodied learning approach, which posits that the brain is activated by physical movement.
  • They lend themselves to inquiry. If they are well-designed and give students autonomy and choice, green screen projects are perfect for inquiry learning, where students do their own research and problem-solving around big questions they’re naturally interested in. This kind of work is much more engaging than what we typically see in traditional classrooms. “We’re moving away from (tasks) where teachers give the problem to the students and students fill out the single right answer. We’re kind of moving more into sociocultural perspectives where students have buy-in, where they’re excited about the work, where they’re choosing pathways that are truly interesting to them,” Bruyère says. “You don’t ever have to say, The paper has to be three pages long, or You need to talk for at least two minutes, or I want to hear your voice like you mean it. All of those things happen naturally.”
  • They are social. Bruyère believes that socially constructing knowledge—sharing learning and knowledge in community—is fundamental to growth, solidification of understandings, and the formation of new curiosities. If your classroom culture allows for collaboration, green screen projects are a great fit. “Students are talking about the tool they’re using, how they’re using it, what they did,” she says. “They’re conversing about how they might best reach their audience. They’re considering the choice that they have and where they might stand or how they might speak and that execution.”
  • They are often cross-curricular. All green screen projects incorporate reading, writing, drama, music, and often at least one other subject area, such as social studies or science.
 

How to Do a Green Screen Project: Equipment and Tech

For any green screen project, the following components are needed:

  • an actual green screen: This is set up behind students as they do their recording.
  • a recording device: The easiest option would be a smartphone or tablet.
  • green screen software: These apps let you take an existing video filmed with a green screen, then add a new background. For use with students, Bruyère recommends Chromavid and Green Screen by Do Ink.

Because many of us are currently teaching in remote or hybrid situations, we’ll look at two ways to do this: at home with limited space and little to no budget, or at school with a little more space and slightly bigger budget.

 

Home Option: Limited Space, Low-to-No-Budget

  • Use one 8.5 x 11″ piece of green paper (or a few pieces taped together) as the green screen background.
  • Have students draw characters to “act” in the video. This is necessary because the size of the screen won’t be big enough to accommodate full-sized, human actors. 
  • Students can record the video on any device and send it to the teacher with instructions for the background image, which could include images drawn by the student.
 
 

School Option: More Space, Bigger Budget

At school, you’ll likely be able to give students access to devices that already have the green screen app loaded, so students will be able to record and edit their videos themselves.

As for the screen, you can still use the green paper option, or look for green tablecloths from a dollar store. If you have a little more money to spend, you could get something designed specifically for this purpose. This backdrop can be hung quickly with the included clips, then taken down when not in use:

If you have space to set up a green screen studio or area, you might want to spring for a full setup like this one that includes a screen, stand, and lights: 

 

How to Do a Green Screen Project: The Process

When Bruyère conducts a green screen project with students, the project loosely follows these three phases: 

Phase 1. The Set-Up

Start by modeling use of the green screen app for students. Bruyère will typically create a low-stakes video with students, where she models both how to use the app and her creative process: how the concept is developed, what happens if she makes mistakes, and how she makes improvements and revisions. Because she goes back to the video several times to make changes and improvements, this phase lasts several days. “Just like in a writer’s workshop model,” Bruyère says. “I consider the green screen a form of authoring, a form of writing.”

Phase 2. The Mess 

Students now begin working on their own projects. This process will be time-consuming and messy by design, and to someone passing by your classroom, it may look like things are a little out of control. But this ‘productive struggle,’ as Bruyère calls it, is necessary. 

“Trust that mess,” she says. “they’re striving. They’re learning. They’re talking to one another, overcoming. And that is just such a beautiful thing because when a teacher dives in, when we solve the problem, we are taking away all the learning from the students. We’re robbing them of that valuable learning that they can transfer to other domains in the future.”

 
 

Phase 3. The Growth 

As students complete their projects, they begin to grow in their understanding of the technology and its possibilities. As you offer opportunities for subsequent projects, you can also share ideas for growth, ways students can stretch into more advanced skills: 

  • Using moving backgrounds
  • Enlarging people
  • Enlarging objects
  • Making students float or fly
  • Adding additional image boxes 
  • Duplicating people 
  • Blending two applications, like posting the video in a Book Creator shareable story

Ideas for Green Screen Projects

The possibilities for projects are extensive and reach across many content areas. Here are just a few for social studies, science, math, and ELA:

Click image to open a PDF of this chart.
 

At a time when actual travel has become a near impossibility, green screens offer a way for us and our students to keep exploring the world, answering big questions, and stretching ourselves creatively. Consider making them an option for your next classroom project and see what happens.

 
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