Purdue OWL: ESL Instructors and Students
The Online Writing Lab (OWL) at Purdue University houses writing
resources and instructional material, and we provide these as a free
service of the Writing Lab at Purdue. Students, members of the
community, and users worldwide will find information to assist with many
writing projects. Teachers and trainers may use this material for
in-class and out-of-class instruction.