This set of learning modules was developed during a project to deliver workplace literacy instruction to individuals employed in the more than 50 businesses related to the activities of the Port of Baltimore. It is intended to accomplish the following objectives: familiarize students with components of clear and direct sentences; give students practice in such sentences; familiarize students with the concept of plain English and various types of letters and memos; give students practice in writing different types of letters and memos; review basic rules of grammar, punctuation, and usage; and review the writing process, from planning to revision. The following topics are covered in the modules: writing diagnostic sentences; using plain English; writing memos and letters; avoiding ineffective writing; writing letters of complaint, bad news letters, thank-you letters, and letters requesting information; recognizing different types of writing and identifying and rewriting poor writing; and reviewing basic grammar, punctuation, and usage principles. Each module contains objectives, procedures, student handouts, and learning activities/grammar exercises. A posttest and answers to all exercises are included. (MN)