I have been using QR Codes for a while in my history classroom. I use them in several different ways. One way I use them is to send students on a timeline hunt. They have a list of events on their handout and they have to scan the QR codes around the room to find the date, then put the events in correct order on a separate timeline page.
I have also used QR codes to have students fill in their notes. I pose a question and to find the answer, they have to scan the code and read a little and fill in information on their notes page.
I have also used QR codes in my World Geography classroom to teach about different dwellings and significant statues and monuments. Students have to scan a code next to an image of the dwelling or statue and read an article to answer questions and fill in a chart.
During remote learning, creating similar activities for students to complete at home would be a great way to keep them engaged in the learning while being outside of the classroom. You can easily place the QR codes in a Word document or PowerPoint or Google Slide and have students scan the codes with their phones.
Below is an example of a QR Code that I created for my World Geography class. I use https://www.the-qrcode-generator.com/ to create my QR codes because of how easy it is to do so. You can save QR codes on this page however, if the codes are not scanned regularly, they expire and they will no longer be available to use. This limitation might be worth exploring a few other sites to create your QR codes if you plan to use them again and again. The image below is a screenshot from one of PowerPoints with an updated QR code.
.jpg){kind=link}