Final answer:
In the book 'Because of Mr. Terupt', Anna came up with the first dollar word by assigning a value of 5 cents to each letter, and discovered that the word 'incomparable' adds up to $1.
Step-by-step explanation:
In the book 'Because of Mr. Terupt', the character Anna is the one who came up with the first dollar word. She discovered that the word 'incomparable' adds up to $1 by assigning a value of 5 cents to each letter. The author, Rob Buyea, uses this dollar word concept as a way to bring the students together and inspire creativity in the classroom.