Talk to them. Simple as that.
grabbing their attention :)
Its a way of saying hello, in japanese though. Its also a way of getting someones attention.
If you are trying to catch someones attention you would use hoye! meaning hey! If you are trying to catch someones attention you would use hoye! meaning hey! If you are trying to catch someones attention you would use hoye! meaning hey! If you are trying to catch someones attention you would use hoye! meaning hey!
try to stay away from them
It means "hey", it is a way of getting someones attention. It sounds cool and makes you feel all big and important.
your goals in a speech are to get someones attention ,keep their attention and stay on topic
Compose a tweet and mention them in it.
A good way to ask a guy subtly if he is interested in you is to send him a note to ask him. A better way would be to just come right out and ask in person because subtlety isn't always the best way to get someones attention when you are interested.
Whether or not you should have someones attention will depend on what you are doing. If you were a teacher trying to teach a class for example, then yes, you should have the full attention of the students.
No if you want a boys attention dont be slutty just talk to him.
kiss themm
There is no 'best' way. It depends on the subject and the student. Whatever method is chosen pay attention to what you are doing.