Spellzone is written mainly with older students in mind: teenagers and adults. The spelling course is used to teach and improve English spelling in schools, colleges and adult training centres. Spellzone is very suitable for helping students with dyslexia. It is also used to help teach English worldwide.
You can access some lessons and free wordlistst for the games, but to utilize the full catalog, Spellzone is available for only $35 a year.