The purpose of the research was to treat immunodeficient mice, implanted with colon-25 tumors, with continuous and interrupted electrochemical therapy (ECT). ECT involves the placement of two electrodes, an anode near the center of the tumor and a cathode into the tumor periphery. A constant voltage is applied across the electrodes for a given period of time. The data showed that the interrupted and continuous ECT resulted in a decrease in mean tumor growth as compared to that of the sham controls. The histology of both ECT groups showed an increase presence of large vacuoles, randomly distributed tumor cells as well as the presence of "crevicing" in the medullary tissue. The differential leukocyte counts showed a distinct neutrophilia and lymphopenia in all groups at day 20 post tumor implantation. The results from the experimental groups appeared to support the findings of previous investigators.

The purpose of this study was to describe the intentions of the designers of the Professional Development and Appraisal System (PDAS) in Texas and the perceptions of teachers regarding its implementation. Information for the study was gathered in two phases using two methodologies. The first was a semi-structured interview with four expert informants instrumental in the design and implementation of the PDAS at the state level. The second component of the study was conducted with teachers using a 37-item Likert survey. The population for this phase of the study was 150 elementary and 150 secondary teachers chosen randomly from three school districts in North Central Texas. The districts were selected to represent a variety of sizes in regard to student population and represent diverse student population characteristics and socioeconomic levels. Data from the semi-structured interviews and the returned surveys were analyzed to determine the designers' intentions and areas of emphasis and to describe the alignment the teachers' perceptions and the designers' intentions. Quantitative data gathered from the surveys were analyzed using descriptive statistics as well as a correlation and function analysis and analysis based on a Cronbach alpha coefficient. The analysis of data revealed the following: 1. Teachers perceived that the implementation of the PDAS has a high level of effect in the areas of learner-centered instruction; classroom management; support for all students; the professional growth of teachers; communication; learning application; and, TAAS improvement. 2. Teachers' perceptions were not affected by years of experience. 3. Teachers' perceptions were not affected by their field of instruction. One implication of this study is that the final design represents the intentions of designers, although the area of student achievement is not weighted as heavily in teachers' evaluations as was originally intended. Furthermore, education leaders in Texas may conclude that teachers perceive a high level of impact upon their classroom practices as a result of implementation of the PDAS instrument. If future research reveals that the perceived impact is accurate and that classroom practices of teachers did change as a result of the instrument's implementation to the degree perceived, then this is a model for policy implementation at the state level that is extremely effective. Furthermore, additional researchers may investigate the link between classroom practices and student achievement. This research study is a first step toward describing effective, replicable practices.

Not available / text

The purposes of this study were to identify the procedures and criteria used for conducting teacher performance evaluation in Texas public schools, to determine the degree to which teacher performance evaluation procedures and instruments reflect the stated evaluation policies of Texas public schools, and to determine the degree to which teacher performance evaluation instruments used in Texas public schools reflect presage criteria (teacher characteristics) as opposed to process criteria (teacher behavior) as opposed to product criteria (student change or gain) as opposed to general job performance requirements (job expectations). The main findings include the following. (1) Teacher performance evaluation is required in all Texas public school districts and is often performed several times a year by more than one observer. The building principal is the key person involved in this process. (2) Although all school districts stated the supervisory function of the improvement of instruction as the major purpose of their teacher performance evaluation policy, a large number of school districts utilize teacher performance evaluation for the administration functions of serving as a basis for retention or dismissal. (3) If in reality teacher performance evaluation were construed as the improvement of instruction or teaching performance, it should be predictable that process criteria (teacher behavior) would account for the majority of items in the evaluation instruments. However, these items accounted for only about one-fourth of the total number. At the same time, items relating to general job requirements accounted for over 50 percent of the items. This exhibits a maintenance rather than teaching thrust. (4) The data gathered on current teacher performance evaluation instruments appear to be highly pertinent to maintaining the school as an organization and appear to be helpful in making personnel decisions. (5) Teacher performance evaluation instruments in Texas public schools are much more heavily weighted toward assessing teachers in their multiple roles rather than the many aspects of teaching.

The problem of this study was the identification of selected characteristics of Minnie Stevens Piper Professors. Purposes of the study were: (a) to determine characteristics of Minnie Stevens Piper Professors, and (b) to determine whether these professors possess characteristics which typify outstanding college teachers as described by the Selection Research, Incorporated College Teacher Perceiver interview. Forty subjects, 20 from community colleges and 20 from senior colleges, were randomly selected from the 1978 through 1988 lists of Piper Professors. Fifteen community college and 11 senior college professors agreed to participate by being interviewed with the College Teacher Perceiver. This interview identified 13 characteristics, or themes, of excellent college teachers.

Not available / text

The purpose of this study was to determine if appraisers using the TTAS in Texas perceived themselves as being objective in the evaluation process. The population for this study was 213 appraisers, both elementary and secondary, chosen randomly from four educational service areas in four regions of Texas. Data were obtained from a 25-item questionnaire mailed to the appraisers. The organization of this study includes a statement of the problem, the research questions, a review of the literature, the methods and procedures used to collect the data, the analysis of the data, and a summary of the findings, conclusions, implications, and recommendations for additional research. Data from the 213 returned questionnaires were treated with the chi-square test of independence. The analysis of data revealed the following: 1. Regardless of the level, elementary or secondary, of the administrator, the majority of respondents held the same views. 2. Regardless of the region of Texas from which the respondents came, the majority of respondents held the same views. 3. Regardless of the number of years of experience of the appraisers, the majority of respondents held the same views. 4. The majority of respondents felt they are objective in their use of the TTAS. The implications are that the TTAS instrument is being used as was its intention, and that the appraisers feel comfortable in the use of the TTAS. Since the TTAS is effective as seen through a majority of respondents, it may be used in future revisions of the current instrument or by other districts as a model by which to begin construction of their own appraisal instruments.

This study investigates the inter-rater reliability of appraisers who award exceptional quality points on the Texas Teacher Appraisal Instrument. Inter-rater reliability was measured when appraisers scored exceptional quality points after viewing a videotaped lesson. Comparisons were made between appraisers when grouped according to elementary or secondary certification, sex, years of administrative experience, and type of training. A total of 707 subjects from 56 school districts participated in the study. Five research hypotheses were formulated with the .05 level of significance for acceptance. All hypotheses were tested by correlation of coefficients, multiple response procedures, frequencies, and percentages. The data measuring inter-rater reliability of the appraisers in training imply that there is very little reliability in the awarding of exceptional quality points on the Texas Teacher Appraisal Instrument. The findings of this study are that certification, sex, administrative experience, and type of training made no significant differences when scoring the instrument. Therefore, it is concluded that the scoring of exceptional quality points is a subjective, professional judgment made by each appraiser when observing a teacher. Since no significant reliability was found, the scoring of exceptional quality points cannot be supported as a reliable means of determining the quality of teaching in Texas schools. Generally, elementary certified appraisers awarded fewer exceptional quality points than secondary appraisers, males awarded slightly more points than females, appraisers indicated no noticeable trend because of years of administrative experience, and less experienced appraisers had the tendency to award more points than experienced appraisers. Therefore, inter-rater reliability in awarding exceptional quality points cannot be expected on a consistent basis. Each appraiser, regardless of certification, sex, years of administrative experience or training, will use his or her own professional judgment when scoring the instrument.

The purpose of this study was to determine the interrater reliability of the Texas Teacher Appraisal System instrument. The performance indicators, criteria, domains, and total instrument were analyzed for inter rater reliability. Five videotaped teaching episodes were viewed and scored by 557 to 881 school administrators trained to utilize the Texas Teacher Appraisal System. The fifty-five performance indicators were analyzed for simple percentage of agreement. The ten criteria, four performance domains, and) the whole instrument were analyzed utilizing Ruder-Richardson Formula 20. Indicators were judged reliable if there was 75 percent or greater agreement on four of the five videotaped exercises. Criteria, domains, and the whole instrument were judged reliable if they yielded a -Ruder-Richardson Formula 20 score of .75 or greater on four of the Based on the findings of this study, the following conclusions v/ere drawn: 1. Forty-eight of the fifty-five performance indicators were reliable in evaluation teacher performance. 2. Seven of the performance indicators were unreliable in evaluating teacher performance. 3. None of the ten performance criteria appeared to be reliable in evaluating teacher performance. 4. None of the four performance domains appeared to be reliable in evaluating teacher performance. 5. The whole instrument was reliable in evaluating teacher performance. 6. Reliability problems with the criteria and domains appeared to be an underestimate of reliability of the Kuder-Richardson Formula 20.

The purposes of this study were to determine the perceptions selected school personnel had of public school teachers' fulfillment of the code of ethics for Texas educators, if these perceptions differed significantly, and if the code had any significant impact on teachers' behavior. The subjects consisted of board members, superintendents, principals and teachers within seven urban, fourteen suburban, and fifty rural Texas school districts. Subjects’ responses to an instrument derived from the Code of Ethics for Texas Educators provided the data for testing. The findings of this study included the following: 1. Board members perceived teachers as fulfilling the code to be slightly higher than did teachers and principals and significantly higher than did superintendents. 2. Superintendents perceived teachers as fulfilling the code to a lower degree than did the other subjects surveyed. 3. Subjects selected within urban and suburban school districts are in perceptual agreement concerning teachers' fulfillment of the code. 4. Rural board members perceived teachers as fulfilling the code to a slightly higher degree than did rural superintendents. 5. Urban teachers perceived teachers as fulfilling the code to a significantly higher degree than did suburban teachers. 6. The code of ethics was perceived as having low to moderate impact on the behavior of Texas teachers.