Dr. Dejene Girma
Dr. Dejene Girma Denbel (PhD) is an Associate Professor of Mathematics Education at the College of Natural and Computational Sciences, Department of Mathematics, Dilla University, Ethiopia. Dr. Dejene Girma Denbel has been working at Dilla University since 2008. He served Dilla University in different academic ranks: Graduate Assistant I, Graduate Assistant II, Assistant Lecturer, and Lecturer Academic Ranks from 2008 to 2015. Moreover, Dr. Dejene Girma Denbel was promoted to Assistant Professor in Mathematics Education by Dilla University in 2016 while studying his Doctorate Degree.
In 2018 He was graduated in Ph.D. with the field of Mathematics, Science, and Technology Education (with specialization in Mathematics Education) from UNISA (University of South Africa) in the Institute of Science and Technology Education (ISTE).
His Ph.D. Dissertation Research Area is: Teaching Mathematics Through Problem Solving (PSA) (Mixed Research Approach)
After serving with his Ph.D. for six years he is promoted to Associate Professor of Mathematics Education by Dilla University on January 1, 2024. Dr. Dejene Girma Denbel has published more than 10 research articles and reviewed more than 60 articles in international journals, recorded on web of science database and awarded certificates of Acknowledgment. Moreover, he reviewed more than three articles in the national Journals.
Educational Background
- University of South Africa (UNISA), PhD in Mathematics, Science and Technology Education (In Mathematics Education),
- Addis Ababa University, MEd. In Mathematics Education, 2010.
- Addis Ababa University Bsc In Mathematics, 2004.
- Bahir Dar University, Diploma in Teaching Mathematics, 1997.
Past Experience (Academic or Administrative)
- Dilla University, 2008 – Till now.
Teaching, Research and Community service
Teaching Mathematic Courses for Undergraduate and Postgraduate students, Conduct Research in Mathematics Education. Advising Thesis work for Postgraduate Students in the Field of Mathematics Education.
- Secondary School Teaching: 1999 – 2007
Secondary Schools Mathematics Teacher and Researcher, Ethiopia. Taught Mathematics from Grade 7 to Grade 12, for nine years.
Home Department at DU
Mathematics
Courses Taught
UNDER GRADUATE COURSE
- Calculus I,
- Calculus II,
- Calculus of Functions of Several variables,
- Calculus of Function of Complex Variables,
- Fundamentals College of Mathematics,
- Applied Mathematics I, II and III for Engineering students,
- Linear algebra I,
- Logic and Set Theory,
- Fundamental concept of algebra,
- Abstract Algebra,
- Plane Geometry,
- Fundamental Concept of Geometry,
- Solid Geometry,
- Methods of Teaching Mathematics I and II
- Fresh Man Mathematics
- Methods of Research in Mathematics
POST GRADUATE COURSE
- Methods of Research in Mathematics
- General Topology
- Real Analysis II
Broad Area of His Research Interest are
- Mathematics Education from Lower to Higher Education;
- Teaching Mathematics Through Innovative approach;
- Technology based teaching of Mathematics;
- Online Teaching Mathematics;
- Designing interactive curriculum of Mathematics;
- Mathematics Engagement Practices amongst learner’s om lower to upper secondary level of education;
- Teaching Mathematics in the 21st Century Approaches;
- Mathematics Education in the HORN of Africa: Towards Harmonization of Mathematics Curriculum in primary and secondary level for common benefits
Published Papers lists with link (DOI)
- Dejene Girma Denbel. History of mathematics (HM) in secondary school mathematics textbook (Taylor & Francis: Cogent Education, Curriculum & Teaching Studies, July 2023)), DOI: 10.1080/2331186X.2023.222898
- Dejene Girma Denbel. Challenges of Teaching and Learning Mathematics Courses in Online Platforms (IGI GLOBAL: International Journal of Online Pedagogy and Course Design (IJOPCD), 2023). DOI: 10.4018/IJOPCD.321155
- Dejene Girma Denbel. Competency Level of Teachers’ Subject Matter Knowledge as a Compulsory for Teaching Secondary School Mathematics: A Case Study on Postgraduate Diploma Trainee (Hindawi : Education Research International, February 2023), DOI:10.1155/2023/8287791
- Dejene Girma Denbel. Students’ difficulties of understanding exponents and exponential expressions (Engineering and Technology Research, July 2019) DOI: 10.15413/etr.2019.0100
- Dejene Girma Denbel. Cooperative learning instructional approach for students’ mathematics achievement and attitude towards mathematics: a case study on probability and statistics lesson at a governmental secondary school in Ethiopia. (Journal of Educational and Management Studies, 2017) DOI: S232247701800008-8
- Dejene Girma Denbel. Some Conceptual Difficulties of Students on Derivation. (Journal of Educational and Management Studies, Oct 2015). PII: S232247701500033-5
- Dejene Girma Denbel. Functions in the Secondary School Mathematics Curriculum. (Journal of Education and Practice, 2015). https://www.iiste.org/Journals/index.php/JEP/article/view/18944
- Dejene Girma Denbel. Students’ Learning Experiences When using a Dynamic Geometry Software Tool in a Geometry Lesson at Secondary School in Ethiopia. (Journal of Education and Practice, 2015) https://www.iiste.org/Journals/index.php/JEP/article/view/18937/19485
- Dejene Girma Denbel. Students’ Misconceptions of the Limit Concept in a First Calculus Course. (Journal of Education and Practice, 2014). https://www.iiste.org/Journals/index.php/JEP/article/view/17236
- Dejene Girma Denbel. Students Difficulties of Solving Inequalities in Calculus. (American Scientific Research Journal for Engineering, Technology, and Sciences, 2013). https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/761
Advised Students list via paper
| S,No. | Students Name | Year Finished | Thesis Title |
| 1 | Dawit Lamiso | 2020 | Investigating Students’ Understanding of Sine and Cosine as Function of an Angle: A Case Study at Hawassa Langano Secondary and Preparatory School in Sidama Region, Ethiopia |
| Semuniguse Alemayehu | 2020 | Comparing Unit Circle and Ratio Methods of Teaching Trigonometric Function: A Case Study in Ataye Preparatory and Secondary School | |
| 2 | Mohammed Seid | 2020 | Assessment of Students’ Misconceptions of a Limit Concept of a Function: A Case Study of Grade 12 at Gojamber Preparatory school |
| 3 | Lemma Arega | 2020 | Students’ Difficulties of Learning Logarithm and Exponential Functions: A Case of Molale Secondary School in Grade 10 |
| 4 | Abraham Bachore | 2021 | Investigating Status of Students’ Participation in Learning Mathematics (In the Case of Hadaro Preparatory School) |
| 5 | Tariku Kelbessa Debel | 2021 | Students’ Learning Difficulties of Fraction and Decimal Arithmetic In Grade Six Mathematics: A Case Of Junior Secondary School Of West Guji Zone |
| 6 | Andinet Mikre | 2021 | Investigating Students’ Difficulties of Solving Word Problems in Secondary School Mathematics: A Case Study Of Grade Nine At Gidole Secondary School Of Derash Special Woreda in S/N/N/P/R) |
| 7 | Birtukan Gebre | 2022 | Exploring Learners’ Problem-Solving Skill In Circle Geometry (In the case of Donga Tunto Secondary and Preparatory School) |
| 8 | Mustafa Wakisha Ambo | 2022 | Investigating Student Difficulties of Solid Geometry Content In
Secondary School Mathematics (A Case Study At Grade Ten In Kilenso Mokonisa Secondary School Of Bule Hora Woreda In West Guji Zone) |
| 9 | Solomon Kabtamu Sime | 2022 | The Relationship Between Grade 12 Students’ Mathematics
Achievement in Ethiopian University Entrance Examination and Their Class Room Test Score (The case study at Shalaka Jatani Ali Secondary School in Borena Zone) |
| 10 | Tesema Yohanes Gshsjjs | 2022 | Analysis of Errors Made by Learners in Simplifying Algebraic Expression in Primary School Mathematics: The Case of Grade 8 Students in Durame Kutur-1 School |
| 11 | Mekonnen Tekle | 2022 | Attitude As Correlates of Students Mathematics Academic Achievement in Amaro Special Woreda Grade 12th Students |
| 12 | Mijesa Wako Nebi | 2023 | Effects of Constructivism Teaching Approach on Students’ Performance in Algebra Contents of Grade 9 Mathematics (In the Case of Guangua Secondary School, Guangua Town, Abaya Woreda) |
| 13 | Senbeto wote xx | 2023 | Examine The Practice and Challenges of Problem-Solving Method in Teaching Mathematics in Case of Yirgachefe Secondary School Grade 9th Students |
Current Activities, (research, project)
- Investigation of Junior School Students’ Cognitive, Emotional and Social Engagements in Mathematics Towards their learning mathematics (A Study in Gedeo Zone, Ethiopia)
Dr. Dejene Girma Denbel, can be reached with the following addresses and Researcher Id’s:
E-Mails
dejened@du.edu.et
dejene28@gmail.com
dejenegirmad@gmail.com
dejene28@yahoo.com
Researcher ID’s
ORCID: https://orcid.org/0000-0003-0147-7815
Web of Science Researcher ID: AEF-0645-2022
Sci Profiles: 2286739
Scopus Author ID: 58114944000