The purpose of this research project was to develop, administer, evaluate, and revise a set of tests which would effectively measure the academic and professional knowledge about English and the teaching of English possessed by prospective secondary school English teachers. The battery of tests was to consist of four parts covering knowledge of language, knowledge and attitude in written composition, knowledge and skill in literature, and knowledge and skill in the teaching of English. The researchers determined content and developed a pool of items for each test. With the help of experts in English, English education, and testing, preliminary drafts of the tests were written, revised, edited, and supplemented with a test administrator's manual. The tests and manual were field-tested at four ISCPET institutions. Field test results and the suggestions of 50 national experts in English and in teaching high school English were used to revise the tests again. The resulting instrument was the "Illinois Tests in the Teaching of High School English." The researchers concluded that the tests and manual, after further national testing and standardization, would be effective in measuring the degree of preparation of prospective high school English teachers. (No test is included.) (LH)