Projectors still have a firm hold as a front-of-the-classroom display in K-12 education, even as students鈥� attention is shifting toward the growing number of digital learning devices they use in classes.
In fact, classroom projectors are the fastest-growing type of technology hardware in 8th grade math classrooms in the United States, according to a new 91直播 Research Center analysis of survey data from the National Assessment of Educational Progress.
But today鈥檚 modern projectors are a far cry from the clunky ones of days gone by. They鈥檝e become more adaptable, interactive, and reliable, and some vendors are starting to use lasers for lighting to eliminate the cost and frustration of having to replace lamps in the devices.
Even so, classroom projectors are now under pressure from other display technologies, especially flat-screen TVs.
The battle for the display-technology market appears to be fueled by educators鈥� growing demands for interactive features. 鈥淲hat we鈥檝e heard loud and clear is that schools need to be able to integrate the projector into the classroom ecosystem,鈥� said Jason Meyer, the senior product manager of
That鈥檚 an ecosystem that is networked and within which both teachers and students often have their own wireless devices. Epson supplies software with its interactive projectors that enables students to wirelessly send what鈥檚 on their screens to the projector display. Or the teacher can use the software to serve as moderator and choose which student鈥檚 work to display. (Other companies that produce classroom projectors include Hitachi, BenQ, InFocus, and Boxlight Mimio, according to a recent market report from Technavio.)
But networked large flat-screen TVs can also be interactive.
When voters in Colorado鈥檚 Boulder Valley school district passed a bond to build several new schools, the district鈥檚 chief information officer, Andrew Moore, re-evaluated display technologies. The new schools will have many large windows and thus a lot of natural light, which can make projector displays hard to see. Flat-screen TVs, on the other hand, don鈥檛 have that problem. And as Moore researched TVs, he realized that they could be interactive, too.
The district鈥檚 standard 1-to-1 computing device is a , and Boulder Valley aims to equip all students with web-based laptops eventually. The district chose Sony 75-inch TVs that use the Android operating system, the same operating system used for Chromebooks. That means student and teacher devices can connect to the display through GoogleCast, sending what鈥檚 displayed on their screens onto the TV display.
鈥淲hen teachers see this technology, it basically changes their view on how kids can share and collaborate in the classroom,鈥� said Moore. 鈥淭he teaching dynamic starts to change.鈥�
Jessie Creech teaches advanced Spanish at Mountain Brook High School in Alabama. Her students speak the language and read nonfiction texts in Spanish well. But reading Spanish literature is challenging because of its complex, descriptive narratives. The students struggled to understand an excerpt from Gabriel Garcia Marquez鈥檚 One Hundred Years of Solitude, for example.
That prompted her to think about how she might create a more conducive atmosphere, like the tropical jungle in which the narrative is set. 鈥淚 wanted my students to feel like we were in a different place,鈥� Creech said.
She started researching possibilities. When she came across a university lab that was using classroom projectors to create an immersive learning experience, she decided to give it a try. With the help of Donna Williamson, the technology director for the Mountain Brook district, and funding from the district鈥檚 Institute for Innovation, she experimented with different types of projectors and software that could tie the images together.
After experimentation with the technology, Williamson realized that none ofthose modern projectors worked very well.
So they took a simpler path. Creech now uses four basic projectors, each positioned to project on a different wall. Using the computer, she can stretch an image from one projector to cover multiple walls, producing a panoramic effect. Or she can project a different image onto each wall. She might put a picture of a jungle on one wall, for example, a map on another, and a quiz about the book on another. She鈥檚 installed tile board, an inexpensive substitute for whiteboards, on her walls so she can write on the images as well.
Williamson said the next step is to make the system interactive.
Meanwhile, Creech is looking for better ways to change the images in each projector. She鈥檚 experimenting with a Myo device from Thalmic Labs, a bracelet that allows a person to control devices remotely through gestures.
One day, virtual reality may be ready for the classroom. But right now, it鈥檚 just too expensive, said Williamson.
In the meantime, she said Creech鈥檚 solution is simple, inexpensive, and effective鈥攁nd it shows how schools can apply current technology in creative ways to meet the needs of students.
鈥淲e want the curriculum driving the technology,鈥� Williamson said, 鈥渘ot the technology driving the curriculum.鈥�
鈥擳am Harbert
Although the TVs can have a higher upfront price than projectors, Moore figures that the long-term maintenance will be less. 鈥淚f you buy a quality TV, they have a long life,鈥� he said. 鈥淎nd you don鈥檛 have to replace bulbs.鈥�
While 70-inch TVs can be $1,000 or less, prices rise quickly after that. Currently, 90-inch models can be $5,000 or more. For comparison, Epson鈥檚 projectors, for example, can range in price from $300 or so for a portable one to $2,400 for an interactive version, Meyer said.
However, Moore鈥檚 approach is not so easy if the flat-panel TV uses a different operating system, is on the school鈥檚 wired鈥攙ersus wireless鈥攏etwork, or the school hasn鈥檛 standardized on a specific brand of laptop such as a Chromebook.
Donna Williamson, the technology director for the Mountain Brook schools in Birmingham, Ala., has looked into flat-screen TVs but needs a display that is 鈥渟oftware-driven and hardware-agnostic.鈥� GoogleCast won鈥檛 work for her schools because the district has a mix of devices, including iPads, Windows laptops, and Chromebooks.
鈥淵ou have to be able to accommodate whatever walks into your room,鈥� she said. In addition, she鈥檚 not convinced that a 70-inch display is large enough for students in the upper grades to see from the back of the room. 鈥淲ith projectors, you can get a 102-inch diagonal display, so everyone has a good view,鈥� she said.
Those are points that Epson鈥檚 Meyer likes to emphasize.
鈥淭here鈥檚 nothing that competes with the kind of image sizes we can do,鈥� he said. 鈥淲e can produce up to a 300-inch image from a $400 projector in a very small package. That can be important in a classroom where students sit 25 feet away.鈥�
Connectivity can also be an issue, whether it鈥檚 a projector or a TV, Williamson said. Sometimes, the display needs a connection to the wired network, but the mobile devices are on a different, wireless network. 鈥淏eing able to connect the classroom devices to the screen in a way that is easy, controlled, wireless, and hardware-agnostic is a feature that is second only to size,鈥� she said.
In many ways, educators said, classroom projectors have become more like interactive whiteboards.
Julie D. Judd, the chief technology officer for the Ventura Unified district in California, has installed Hitachi interactive short-throw projectors that can be mounted above a traditional whiteboard, turning the whiteboard into an interactive system. The projector connects via infrared technology to a pen so a teacher can write on the whiteboard. Using software, the projector captures whatever she writes on the board.
鈥淚t鈥檚 like an endless whiteboard,鈥� Judd said.
