Yep even tho we’re not friends lol
This form of persuasion is ethos. The author is using a credible source, a teacher, to prove that the activity will help students learn. It's important here that her mom is a teacher, if she wasn't, her mom might not be a credible source.
What are the options tho? And what book is this?
The first use of the phrase is matter-of-fact. In the second stanza, the statement is followed by a period, which shows resignation. However, at the end of the poem, Dunbar almost shouts the phrase defiantly. The mask seems to become something he wears proudly. Through this gradual emphasis on the phrase, Dunbar could be implying that African Americans used the "mask" to hide their suffering and gain a kind of victory against society.