Heyz...here are some nice videos which you can learn from
The first one here is from Paquita. Notice the use of arms....rounded arms, elbows lifted. Practice make perfect!
This one is a wowwy one also from Paquita...
This is one of my favourite dancers...Polina Semionova! This style is not yet recommended for my dear beginners =P. Appreciate her use of rounded arms. She uses alot of "performance style" arms (eg. broken wrists) which you guys can learn later after mastering the basic techniques. Another thing to learn is her expression...beautiful!! Oozing with the joy of dancing =P
Some homework for Beginner Class Dancers: Find links to videos of nice use of arms and tag them!