They appear in random order sentences taken from the literature to correct spelling errors and then error checking.

You can choose the spelling use and level of difficulty.

- At the first level sentences are short, are not taken from any literary work and have help.
 
- On the second level are longer sentences, are taken from the works of Spanish and world literature, and have help.

- The third level prayers are equal to or larger than the second, but contain more errors and are also taken from Spanish literary texts, however no help.