ETS e-rater
The e-rater grammar feedback technology, developed by ETS®, automatically checks submissions to an assignment for grammar, usage, mechanics, style and spelling errors; providing in-depth feedback with on paper marks. To use e-rater technology for an assignment it must be enabled during assignment creation.
Note: There is a 64,000 character limit for ETS e-rater checking. Papers in excess of this limit are not eligible to receive grammar checking.