To change when your school year starts or ends on Whooo's Reading, click the drop-down in the top right of your account, then click Settings. On that window, click School Year on the left (or go to whooosreading.org/settings/school-year if you are logged into your account):
Choose the starting month and ending month of your school year. Changes will save automatically. This will align your student data and goals to your school year.