Sentence 1: Isla had trouble remembering to brush her teeth. 
 Sentence 3: She noticed how yellow and ugly her teeth looked in the picture 
 Sentence 4:  From then on she vowed to brush her teeth better 
 Sentence 5:  Luckily her teeth began to improve slowly 
 Option 1: She set a daily reminder so she always brush her teeth everyday.. 
 Option 2: She thought nothing of it until one day she was in some photos.