In 2nd grade, students are typically introduced to basic punctuation marks. Here are some examples of proper punctuation for 2nd grade:

1. Period (.) - Used at the end of a sentence that makes a statement or gives a command. Example: I like to play outside. Example: Please clean your room.

2. Question mark (?) - Used at the end of a sentence that asks a question. Example: What is your favorite color? Example: Can I have a piece of candy?

3. Exclamation mark (!) - Used at the end of a sentence that shows strong emotion or excitement. Example: I won the game! Example: Look at that beautiful rainbow!

4. Comma (,) - Used to separate items in a list. Example: I like apples, bananas, and oranges. Example: My favorite colors are red, blue, and green.

5. Quotation marks (“ “) - Used to show the exact words someone said or to indicate the title of a book, movie, or song. Example: She said, “I love ice cream!” Example: I watched the movie “Frozen” last night.

6. Apostrophe (‘) - Used to show possession or to indicate missing letters in a contraction. Example: The dog’s bone is buried in the backyard. Example: I can’t wait to go to the park.

These are just a few examples of punctuation marks that 2nd graders may learn. It’s important to note that the complexity of punctuation increases as students progress through grade levels.