There are quite a few scanning apps. For example CamScanner, DocScan.
Using a mobile phone, you can take a picture of a missing invoice, documents of your mortgage, a school assignment.
During the lockdown due to the Covid-19 Pandemic, students were assigned homework, most of the times and particularly al lower levels, it was handwritten on a writing pad.
Easy-peasy... Get your mobile, take a picture of your class assignment, open the app, find the document which will be scanned , adjusted and turned into a pdf doc, upload to Moodle or Classroom and that's all.
Carmen F Nevado, English teacher, worked with the app:
The Commerce and Marketing teacher, Ana Gutiérrez, worked with a Drive function during lockdown due to the Covid 19 pandemic. Students learned how to scan photos, cut and turn into a PDF document.