Hillsboro Community Unit School District 3 fosters a student-centered culture with high expectations for each student to reach his or her full potential.
https://www.khanacademy.org/science/ap-chemistry
http://www.bozemanscience.com/ap-chemistry/
http://www.bozemanscience.com/chemistry/
https://www.khanacademy.org/science/chemistry#atomic-structure-and-properties
