
Traditionally, I provide materials for upcycling books into beautiful ornaments and gift tags, and I set out card stock and stickers for students to make holiday cards. This year, in an effort to promote the use of technology in the library, I also set up a digital holiday card section that is easy to set up and tear down and most importantly is inexpensive!
For the green screen, I purchased two plastic tablecloths from a local dollar store. I layered them, as I had to hang the tablecloths over our book shelves because we do not have enough wall space. If you have a blank, light-colored wall, you most likely would only need one tablecloth. Note that these are not very durable, but they are inexpensive. If you wish to have a green screen that lasts for many years, I would recommend purchasing a more durable fabric for your screen.
For the app, I purchased Do Ink for just a couple dollars. I chose this app for ease of use - there are other apps for more complicated green screen work, but for simple digital holiday cards, Do Ink works great! Since I only have one screen set up, I really only needed to purchase the app to use on one device.

Do Ink has some great tutorials that you can use with students; however, I wanted some written instructions that I could hand to students as they walked through the door. Here are the instructions I made in Slides. I printed six to a page. I made the instructions fairly general so I would be able to use them anytime, even if it wasn't the holidays.
I created a few holiday card backgrounds and saved them to our iPad photos that students could choose from, or the app has pre-loaded backgrounds that students could use, as well. Most students chose to find their own backgrounds. I recommend using Creative Commons for free, copyright free photos.
At the holidays especially, high school kids are just big little kids - their eyes light up when I tell them that they can take green screen photos in the library and make crafts! And the best part is that when we are done, it will only take a few minutes to tear down our temporary green screen (unlike the craft projects I set out for students...those take quite a while to clean up...). Have a happy holiday break, and happy making!