khanacademy

https://www.khanacademy.org/coach/dashboard

1. Create an account
2. use the appropriate code for your class

CODES:

1.  First period:        Class code: EMUXT6
2. Second period:    Class code: D9P4G9
3. Third period:       Class code: ZAZ9UA
4. Fourth period:    Class code: VD4XGM
5. Fifth period:        Class code: 9AFHC5