It depends. If it is part of a title, yes. If speaking generally, no.
Special Education Law 44526-A helped thousands of students.
Thousands of students benefited from the revised special education law.
In the middle of a sentence, you don't capitalize second floor.
No.
No they shouldn't be capitalized.
No, you would not capitalize either word in this sentence
The way you capitalize other words. If it's at the beginning of a sentence it should be capitalized. If it's not then it shouldn't be capitalized.
Only capitalize 'spelling' if it is the first word in a sentence.
You underline or italicize them.
In most quotations you should capitalize the first word and the other words necessary; as in any other regular sentence. There is no need to capitalize most words just because they are in quotations.
Proper nouns
All words are capitalized at the beginning of the sentence including am. Example: Am I the least to know about her?
Unless they are proper nouns or begin a sentence, no.
Because its a name and you capitilize every ones name.