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Image Processing for Teaching (IPT) in Science Classrooms

Kadriye O Lewis

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METHODOLOGY

The research site and setting

The student population in this seventh grade class in Cincinnati Public Schools consisted of diverse ethnic groups including African American (50%) and Caucasian (50%). For the purpose of the study, the group of seventh graders will be designated by the name "Class A" and the teacher of this class will be called Ms. Rose.

More than half of the teachers in this school was directly or indirectly involved with computers. The school's goal was to educate all students for the preparation of life in the new information age. Each classroom had one or two computers; usually one computer was attached to a big monitor for the presentation of whole classroom instruction. Class A was next to the spacious well decorated Math and Science Project Computer Lab. The walls were full of various scientific pictures including animals, a contour map and a regular map. On the left was a large rectangular blackboard with pictures and graphs hanging on the left hand side. Almost everything that the students may need was located in the classroom.

There were 30 chairs in the left middle of the lab. The teacher's computer was connected to a large monitor. This section of the lab was used for teacher presentations or whole class instruction. There were 16 Power Mac computers in an oval pattern under a big beach umbrella in the middle section of the room. The room was full of different instructional tools such as toys, musical instruments, hats, wooden crafts, plants, books, magazines, shells, masks, and umbrellas. CSP Technology Coordinator, Mr. Admon, who is the creator of these labs, describes the labs as:

"Hands-on, adventure project-based classroom environments where students enter a world of technology discovery. Looking at the two individual lab settings you might think you are in a history museum. Each lab has its unique focus; the project lab is made up of 16 multimedia computer workstations with worktables located around the room for the cooperative team to share their research. Elephants, wild painted gym shoes, a wooden man, pigs, baskets, a motorcycle, historical items, and much more are found around the outer room walls. The theme is high tech vs. early man with a round umbrella and computer tables to give the outdoor creative look in the center of the room. The writing lab has over 28 computers on tables in two-combined horseshoe shapes, allowing easy viewing of monitors from the main instructor's workstation. The theme for the writing lab is travel, with a canoe, bike, western saddle, tight rope, rain forest plants, African masks, Appalachian mountain crafts/culture items, travel guides, suitcases, and more spread around the room. This theme is to remind students that they can write as well as go anywhere using their computers as magic carpets."

Sample

The purpose of sampling is to provide methods for allowing the researcher to estimate how well the sample represents the population of the study under investigation. The rationale for selecting Class A to participate in the study was based on the teacher's enthusiasm and her eagerness to contribute to this study. This class consisted of 17 males (53% African American, 47% Caucasian) and 11 females (45% African American, 55% Caucasian) with ages ranging from 12 to 15. This was the only class that used the IPT software in their science learning and teaching.

The teacher, Ms. Rose, has 15 years teaching experience with the last nine years in the Cincinnati Public Schools teaching seventh grade. She has some experience with computer technology and is always interested in continuing to explore new ways of using technology in her classroom.

Student interviews were conducted using random sampling. This sampling technique is consistent with the grounded theory approach. However, additional data informants were selected using the cascading selection technique. Teacher referrals were used to stratify this sample.

Instruments

In this study qualitative data sources included a computer background questionnaire, classroom observations, face-to-face interviews, other artifacts such as activity sheets and their instructions. The researcher's reactions and impressions were also included. The data was collected using audio and video recording devices to facilitate the analysis of the data.

Data collection procedures

Classroom observations and interviews with both the teacher and the students were the main method of collecting the data. I conducted my observation sessions both in the classroom and in the computer lab with a weekly phone contact with the teacher. Each observation session resulted in written field notes with detailed accounts of the event observed. This study included four observations. I videotaped the classroom sessions using a portable camcorder with sound recording capabilities for the data analysis. In addition to my classroom observations, I conducted one in-depth interview with the teacher and eight interviews with the students. The interviews were audio taped, and each tape was transcribed. Each student and the teacher completed a brief computer background questionnaire.

Semi-structured interviews were used to compare data from the informants. The interview with the key informant took approximately an hour, but the interviews with the participants were 20 to 25 minutes in length. The key informant and the participants were encouraged to talk about the subject under investigation. To elucidate doubtful points, rephrasing and probing interviewing techniques were used toward the respondent's answers. During the interview, complex and confusing questions including using leading questions that affect the key informant and participants' answers were avoided.

Data analysis

This study has taken into consideration the guidance provided by the literature on methods of data analysis. Bogdan and Biklen (1992) suggest that data analysis is an ongoing part of data collection (p.154). In this study, the data analysis was an ongoing process to provide direction for the study. This ongoing analysis provided an opportunity to clarify, modify and refine information.

In order to determine the effectiveness of IPT the data was analyzed using grounded theory procedures. For this study, four steps were taken to analyze the data. First, interviews were transcribed verbatim, checked for accuracy by the researcher, the key informant and the participants, and edited for identifying information. Second, the interviews and field notes were coded based on the interview dialogue three times. Third, the texts were read and reread by the researcher with the goal of identifying categories, themes, and reoccurring processes. Finally, to assure the validity of findings, the researcher used constant comparative method, which is consistent with a grounded theory approach (Glaser, 1978; Strauss, 1987; Strauss & Corbin, 1991; Annells, 1996).

Triangulation increases the reliability of the data and the process of gathering it. Two types of triangulation were used in this study:

  • Data source triangulation, when the researcher looks for the data to remain the same in different contexts; and
  • Methodological triangulation, when one approach is followed by another, to increase confidence in the interpretation (Denzin, 1984).

Combination of the methodologies strengthened the study through triangulation. In addition, electronic analysis FolioViews was used for the data analysis process. This provided the researcher a very powerful organizational system for the data.

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Meridian: A Middle School Computer Technologies Journal
a service of NC State University, Raleigh, NC
Volume 8, Issue 1, Winter 2005
ISSN 1097 9778
URL: http://www.ncsu.edu/meridian/sum2002/ipt/2.html
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