Are these commas correct?

The answer, class, is written on the board.

We should of course ,double-check, our answers before turning in the test.

Without a doubt, that was the best performance, of the night.

The teacher smiled at the class, and she began the morning lesson.

The dog grabbed a bone, a toy and a blanket from the yard.

The student packed a bag for school, and she headed out to catch the bus.

Their dog, a golden retriever, barked at the mailman.

The directions, Jonathan, were confusing because the teacher spoke too quickly.

Don’t forget your lunch, Marcus.

Dogs, in my opinion, are the most loyal pets you can have.

The tired, forgetful student packed a bag for school.

My sister who loves to bake, made chocolate chip, cookies yesterday.

Well I’m not, sure if I can finish all the homework tonight.

Yes we are going to the museum on, Saturday.

Mr. Thompson I forgot, to turn in my homework.

My best friend Olivia won the, spelling, bee yesterday.

We walked through the crowded noisy, park to find a quiet place to read.

The bird flew over pine trees, oak trees, and maple trees.

The museum, filled with ancient artifacts, was crowded with tourists.

We are going to the museum, a popular art exhibit, on Saturday.

The rushed, student packed a bag for school, and she ran out the door.

Your, backpack Lisa, is still in the car.

Indeed, the movie was even better than I expected.