This Powerful Teaching Tool can be Affordable Too
There have been some great blog posts from flipped educators Jon Bergmann, Kevin Hogendorp, and Joel Speranza recently on how to make lightboards. I want to share with you how I made my lightboard for less than $100. I also want to show you how to maximise the quality of your lightboard videos by how you set up your studio, lighting and camera.
What is the Lightboard?
The lightboard is a piece of ultra-clear glass that is edge light with LED strip lights. The presenter writes on the lightboard with a neon marker. The light bounces around inside the glass until the light hits the neon marker writing and then exits the glass through the marker. This makes the writing really pop out against the black backdrop.
I use the lightboard to teach concepts that require formulas, calculations, diagrams and not too much text. Lightboard videos are very quick to make with minimal post production. So they are also helpful when you have a lot of videos to make in not much time.
Students like learning from light board videos because the experience is similar to the teacher teaching at the whiteboard. But it is even better because the students get to see the teacher’s face.
How to make the lightboard
- Ultra-clear glass sheet from a picture framer. Glass size will depend on the size of the studio space you have. Picture glass is only 3mm and not safety glass but it works and is cheap and readily available. Alternatively, you can get 10mm glass from an aquarium maker.
- 4 Dressed pine 45mm x20mm x 1m lengths
- LED strip lights
- Wood screws
- Wood glue
- 2 lengths of pine shorts 70mmx30mm x 500mm or similar.
- 2 shelf brackets
- 6 coach screws
- Two bolts, washers and wing nuts.
- Use a router or bench saw to recess a channel out of the 45×20 dressed pine timber. The channel needs to be wide enough for the LED strips.
- Measure, cut and mitre the corners of the timber. Length of the timber needs to be measure from the base of the channel. Cut the mitre out from this point. (See diagram below).
- Drill a hole near the corner of one of the timber lengths to feed the wire for the LED lights.
- Lay the LED light strip in the channel and adhere with the adhesive backing. Place the LED lights top and bottom. When trimming the strip, be sure to only cut at the point indicated by the scissors.
- Glue and screw 3 sides of the frame together.
- Run the LED leads down one side of the frame and out the hole. (you will need to cut the plugs off the wires and then solder them together again)
- Slide the glass into the frame and glue and screw the final side in place.
- Solder the switches and plugs back in place. I secured the wire repairs together with electrical tape and secured the switches together with double sided tape.
Because the board is small and portable, I mount it on a desk using a portable base. To make the base:
- Secure the shelf bracket to the 70×30 pine shorts using coach screws.
- With the lightboard against the brackets, position an off cut of timber on the pin short to hold the lightboard in place (see below)
- Glue and screw the off cut in place.
- Screw a hole in the lightboard for the bolt to be inserted through the bracket and lightboard. Repeat for the other bracket.
- With the lightboard mounted in place, insert the bolts and washers through the brackets and lightboard and secure with the wingnuts.
Writing on the lightboard
I use Expo Neon dry erase markers.
Clean the board with a damp lint free microfiber cloth. Then repeat with a dry lint free micro fibre cloth. Don’t worry if you can still see smudges, you can adjust the camera settings so the smudges are not visible in the camera shot.
How to set up the studio
Lightboard videos look best if the following are achieved:
- The backdrop is totally black, (black matt backdrop, barn doors on lights, camera settings)
- The talent is well illuminated, (three lights on talent)
- The writing on the board is sharp and coloured, (Camera setting, pens)
- The glass is not visible (camera settings).
Black backdrop –
You can use a piece of black calico or muslin that will cost about $15. Or you could paint the wall matt black. You can purchase black studio backdrops from specialist camera retailers and EBay but they are more expensive. Size of backdrop will depend on the size of lightboard. My backdrop is 2m x 2m.
You need to light the talent but not the backdrop. I use a light on either side of the talent and also a hair light.
There are many options for lighting. I started with desk lamps and have now progressed to LED studio lights on light stands (mine are below). Don’t use flood lights as they through too much light and are too hot. The LED lights are also used for my green screen videos or are a good investment.
Use barn doors on the lights to cut the light from hitting the back drop (this makes the backdrop absolutely black in the video).
I have attached the hair light to the top of the board, alternatively, you could use a boom or secure it to the ceiling.
First, I just used simple desk lamps, now I use LED studio lights. Note the barn doors.
The hair light is secured by an arm made of ¼ inch threaded rod.
Same thread as the light and camera.
Top view of studio lighting set up.
I use a digital SLR with an audio jack. (Cannon 700D with a 18-55mm lens) mounted on a tripod. This is an entry level DSLR and records to a memory card.
I use a digital SLR so I can adjust the aperture and shutter speed- this allows me to remove any smudges and glare from the lightboard and really brings up the colour. I set the shutter speed at 500 and the aperture at 5.0.
You don’t need to use a DSLR. Some lightboard users just use a webcam and others a compact digital camera and even a smart phone. They don’t give you the same level of adjustment.
I use a Rode shotgun microphone. The microphone is on the presenter’s side of the lightboard so I need an extension cord to connect to the camera. I mount the microphone on a tripod out of shot.
Another option is a lapel mic. It doesn’t even need to be cordless. You can get a lapel mic from EBay for less than $30.
How to plan your video
Keep your video short. One concept per video. I try to keep my videos less than 5 minutes. If it goes longer than that, I try to cut the video into two shorter videos because there is possibly more than one concept.
Think about how you will build the concept like you would at the black/white board in class.
Think about what you will write on the board, and where you will write it.
It is best not to have a script- you don’t have a script at the whiteboard. But you might want some notes in front of the board but out of shot. Or you can look down to check notes and then cut it out in post-production (or not).
Write the title of the video on the board before starting.
You might wish to add other content to the board before starting shooting. Eg a diagram.
Editing the video in post-production
One of the benefits of lightboard videos is that they are quick to film and require minimal post production. However, as a minimum, you will need to flip the video 180° horizontally so that the viewer can read the writing.
I use Camtasia Studio for all of my post production. I flip 180° and crop the beginning and end of the video when I am entering and exiting the shot from starting and stopping the camera.
You can do more post production if you wish. This can include;
- Adding picture in picture images or diagram
- Cropping out mistakes
- Speeding up the video when writing
- Adding intro music and title sequence
- Adding other video footage
There are other products for post-production including Adobe Premier Pro.
Some cameras may be able to rotate video 180° and as a last resort, you could film into a mirror set at 45°.
Tips and tricks:
- Wear a dark coloured shirt so that writing can be read over the top.
- Try not to write over your face.
- Teach students how to watch your videos; how to watch and take notes.
I have improved my video quality progressively over the year through trial and error. It is such as good learning experience in design thinking that I have a year 12 student making my new lightboard.
You can check out some of my lightboard videos on YouTube here: https://www.youtube.com/channel/UCJVT4HVax1cbn4355e_3UWw