Complex sentence: Stephanie and Gia begin their final year in junior high and prepare for high school, whereas Stephanie still continues to deal with issues such as boys, wild parties and dangerous joy riding, which eventually leads to a car crash.
Split into simpler sentences: Stephanie and Gia begin their final year in junior high and prepare for high school. Stephanie continues to deal with issues such as boys, wild parties and dangerous joy riding, which eventually leads to a car crash.