Twelve lessons were learned from the Kern/Eastern Sierra Writing Project (KESWP): (1) successful teachers of writing can be identified and their practices demonstrated to others; (2) writing is an important way to learn as well as to communicate--the process of writing is as valuable as the product; (3) teachers of writing must write; (4) most writing teachers are inadequately prepared and lack opportunities to become aware of current research in writing; (5) the responsibility of teaching writing, shared by all levels of the educational community, can best be addressed by cooperatively planned and funded efforts; (6) the best teacher of teachers is another successful teacher; (7) the skills besides good writing needed by a teacher/consultant can be taught and learned; (8) effective teachers of teachers must know themselves as well as the system with which they are working; (9) for a writing improvement program to be effective, all parties concerned must agree on the nature of the training and the expected results; (10) specific working strategies can help teacher/consultants become more effective; (11) there is a set of known criteria for quality programs of staff development; and (12) individuals with consultant skills and knowledge of staff development programs can make major contributions to the improvement of writing in school systems in which they work. (JL)