Here's why:
* Nouns: "Homework" is a common noun, not a proper noun. Proper nouns (like names of people, places, or specific things) are capitalized.
* First Word: The first word of a sentence is always capitalized.
Examples:
* Correct: I have a lot of homework tonight.
* Correct: Homework is important for learning.
* Incorrect: Homework is important for learning.