How to sneak in my iPhone 6+ to school?

Basically my school doesn't have metal detectors or so but they check out bags do you have any idea how I can hide it and not make it obvious? And also how can I stop sounds and phone calls and notifications and all that

Hide it in your bag

Keep it at home. There's no reason to bring it to school. If your parents need to talk to you they will call the school, just like parents have been doing for years.

There's no reason to bring it if it's not allowed - that would be stupid

Put it down your pants.

If you want to stop sounds, calls and notifications, turn it off.

Sounds like a great way to get it confiscated!
What an idiot.

Put it in your pocket on silent or vibrate mode? You said they check bags only so I'm guessing they don't check your pockets.

Just leave it home! You don't want it getting lost, damaged, or taken away.

Put it down your pants.

If you want to stop sounds, calls and notifications, turn it off.

Simple it is! Enter the Silent Mode!