Riley shouted you are going to be late for school add correct punctuation marls

Riley shouted, "You are going to be late for school!"

Step-by-step explanation:

First, when writing names of persons or nouns, and also the start of any sentence will be in capital letters, thus 'riley' should be written as Riley.

Second, any form of speech or dialogue has to be put within quotation marks, that will show the actual dialogue of the speaker.

Lastly, sentences at the start of any speech will be in capital letters, and the sentence should end with a full-stop, or in this case, an exclamation mark before the closing quotation.

Riley shouted, "You are going to be late for school!"