Ella and Olivia series by Yvette Poshoglian

Ill. by Danielle McDonald. Scholastic, 2012.
(Ages: 6+) Friendship. For newly emerging readers wanting more than a picture book, then this series will help them move into easy chapter books before taking on something a little more imaginative. The stories about two best friends, Ella and Olivia will not stretch the imaginations of its readers. Simple stories, simply told, without too much complication will make these an easy read for new independent readers, wanting to achieve quick success.
The new girl. ISBN 978 1 74283 499 3.
This story has the girls starting a new term at school. Within the class is a new girl who appears not to like anything about her new school or the people in her class. Ella decides to do something about this situation and the girls all come to realise that they are all friends and no one is trying to break up friendships.
Ballet stars. ISBN 9781 74283 498 6.
The girls both love their ballet lessons, but when the teacher decides that they will put on Cinderella as their term production, the girls are mystified about who will take the lead role. A solution is found for both girls to be a star.
Fran Knight