The following 3 focuses were identified in this study: (a) analyzing t
he characteristics of students' writing that most contributed to their
passing or failing the Subject A Examination, an evaluation of studen
t writing competence required by the University of California; (b) des
igning instruction to help college-bound students develop their writin
g with respect to criteria essential for competent writing; and (c) as
sessing the effectiveness of the instruction in (b) above. First, 250
Subject A Examinations that had been scored holistically were evaluate
d according to an analytic scoring guide with the following 5 componen
ts: issue, position, support, macrolevel skills, and microlevel skills
, Second, the instruction given to Grade 11 honors English students wa
s designed to improve writing, particularly with regard to position an
d support. The writing consisted of the following types: (a) examples
of previously scored Subject A Examinations and introduction of the sc
oring guide, (b) summary writing and summarization techniques, (c) syn
thesis writing, and (d) argument writing. Third, the effects of instru
ction were assessed. Results of the nonorthogonal repeated measures of
analysis of variance indicated that instruction in summarization was
effective for improvements to position, support, macrolevel skills, an
d microlevel skills. The effect for issue approached Significance. The
results for synthesis instruction were less impressive.