My Granddaughter is much older and college algebra is really holding her up. Her 4 year college is taking a long time to finish. She is putting herself through college, trying to live her life and working part time at several jobs. She finally has a Prof. telling them they will never need to memorize the formulas and allows them to use their book. She should finally get through it so she can get a degree next spring. Sure has helped the college out. She is going into marketing and international sales.