Does it ever happen that you wrote a sentence with a grammar mistake you did not know about? It happened to me all the time before I learned about common grammar mistakes and gradually fixed the consistent errors.  So, if...

The digital learning content area is vast. You can use texts, slides, graphics and images, audio, small and large videos, quizzes, etc. to teach your students and engage with them. However, different types of eLearning content engage with learners differently. ...