Step 1: Pretend you're in a meeting with your professor, but actually, you're just browsing cat videos on your phone under the table.
Step 2: When your professor asks you a question, just give a non-committal "uh-huh" and stare intensely at your phone screen.
Step 3: When your mom asks you if you've done your homework, just say "I've been working on it, mom, I swear" with a completely straight face.
Step 4: When your friend asks you to study together, just pretend you're really interested and start rambling about the finer points of the subject, but secretly, you're just Googling the answers.
Step 5: When your text message is about to expire, just quickly type out a fake apology and send it, and then immediately go back to browsing cat videos.