Are there any things i can do to improve a split & scorpion ?

Okiee Dokkie , so im a cheer leader and i might be a flyer this year. And if i am i want to know how i can get me split and scorpion to be improved, i can kind of do them both but not fully. Can anybody help and tell me something i can do so i can get them ?? Are there any certain stretches i can do ?