First she had to practice the incantation.. which usually was the hardest for her, yet she was getting more efficient at saying incantations since she came to Hogwarts. She wrote down notes first, being an OWL student and all. Then she tried the incantation

"KAHR-pay - ruh-TRACK-tum" Sarah said breaking it up into manageable pieces. This made it easier for her. "KAHR-pay - ruh-TRACK-tum" she repeated. She said it again finishing with "Carpe Retractum"

Now it was time to practice the wand movement It was like a cowboy movement. Utterly awesome" ride 'em cowboys" Sarah called as she practiced which whip like motion. "yeeehaa"