9 month old hitter and scratcher!

daina
madeline is 9 months old and goes to daycare while i am working, she has always been a hitter and a bit agressive and loud since she was smaller but now that she is getting older she is becoming a lot louder and a lot more agressive! 
today was the first day she actually hurt a baby younger than her at daycare! 
when i take something away or say no she gets upset and hits, scratches, or pulls me...
do any other mamas have these issues with their babys and if so what advice can you give me on how to control this and make her understand this is definately not ok behavior!!!