Chấm trắc nghiệm bằng mã QR

Applications used to support teachers and students: 1. Submit the essay and multiple choice test by taking a photo and converting it to a PDF file and then submitting it to the teacher via email or other sharing. 2. Each multiple-choice test will be assigned a QR code to save students' answers. 3. Teachers receive the PDF file of the students' multiple-choice tests, just scan the QR code on it to quickly grade the test