Mathematics Education
Research on effective teaching, learning and assessment in mathematics education.
"Knowledge today
for a better tomorrow." — Charles Siaw Obeng
for a better tomorrow." — Charles Siaw Obeng
Charles Siaw Obeng | BSc, MSc, MPhil
Charles Siaw Obeng is a mathematics educator and researcher with research interests in mathematics education, geometry and geometric thinking, mathematics teaching and learning, educational assessment, and related areas.
His research focuses particularly on students’ geometric thinking using the Van Hiele model.
Name: Charles Siaw Obeng
Research Area: Mathematics Education
Professional Role: Mathematics Educator and Researcher
Institution: Serwaa Nyarko Girls' Senior High School, Kumasi, Ghana
Research Highlights
Geometry & Van Hiele Theory
Investigating students' geometric thinking and Van Hiele levels.
Mathematics Teaching & Learning
Exploring strategies to improve students’ achievement and engagement in mathematics.
Featured Publications
Van Hiele Geometric Thinking Levels among Senior High School Students in Ghana: Evidence from the Asante Akim South Municipality
Applied Mathematics (2026)
Accepted View PublicationGender Differences in Van Hiele Geometric Thinking Levels Among Ghanaian Senior High School Students
International Journal of Education (2025)
Published View PublicationFactors Influencing Students’ Geometric Thinking in Senior High Schools
Journal of Mathematics Education (2024)
Published View PublicationAcademic Qualifications
MPhil Mathematics Education
Kwame Nkrumah University of
Science and Technology (KNUST)
Completed: Nov 2025
MSc Mathematics
University of Cape Coast (UCC)
Completed: Sep 2015
BSc Mathematics
Kwame Nkrumah University of
Science and Technology (KNUST)
Completed: Jun 2013
Academic & Research Profiles
Interested in Research Collaboration?
I welcome opportunities for research collaboration in mathematics education, geometry education, educational assessment, and related areas.
Academic Profiles
My academic and research profiles can be accessed through the following scholarly platforms.
Research & Academic Presence
I maintain an active presence on major academic platforms to share my research, publications, and professional activities. You can follow or connect with me through the links below.
ORCID
My unique researcher identifier (ORCID) links all my academic work.
Visit ProfileGoogle Scholar
View my publications, citations, and research impact on Google Scholar.
Visit ProfileResearchGate
Connect with me and explore my research, projects, and publications.
Visit ProfileAcademia.edu
Read and download my research papers on Academia.edu.
Visit ProfileConnect with me professionally on LinkedIn.
Visit ProfileResearch Visibility
Academic profiles increase the visibility of my research, make my publications accessible to a global audience, track citations and impact, and support scholarly networking and research collaboration.
Research Collaboration
I welcome opportunities for research in mathematics education, geometric thinking, educational assessment, and related areas. Feel free to contact me.
Academic Qualifications
MPhil Mathematics Education
Kwame Nkrumah University of Science and Technology (KNUST)
Completed: Nov 2025
MSc Mathematics
University of Cape Coast (UCC)
Completed: Sep 2015
BSc Mathematics
Kwame Nkrumah University of Science and Technology (KNUST)
Completed: Jun 2013
Certificate in Education
University College of Education, Winneba
Completed: 2010
HND Mechanical Engineering
Kumasi Technical University
Completed: 2005
Academic Journey
A timeline of my academic development
1
→
HND
Mechanical
Engineering
Kumasi Technical
University
(2005)
2
→
Certificate
in Education
University College
of Education,
Winneba
(2010)
3
→
BSc
Mathematics
KNUST
(2013)
4
→
MSc
Mathematics
UCC
(2015)
5
MPhil
Mathematics
Education
KNUST
(2025)
Areas of Academic Preparation
Mathematics
- • Pure Mathematics
- • Applied Mathematics
- • Mathematics Education
Education
- • Teacher Education
- • Curriculum Studies
- • Educational Assessment
- • Teaching and Learning
Engineering
- • Mechanical Engineering
- • Technical Skills
- • Problem Solving
- • Analytical Thinking
Research Skills
- • Academic Research
- • Data Analysis
- • Scholarly Writing
- • Educational Innovation
From Academic Preparation to Research
My academic background in mechanical engineering, mathematics and education has provided me with a strong interdisciplinary foundation for my work as a mathematics educator and researcher. This diverse preparation has enhanced my analytical thinking, problem-solving skills, and understanding of teaching and learning, which informs my research in mathematics education, geometry, geometric thinking, and educational assessment.
Related Academic Documents
You can view or download my academic documents below (where available).
Interested in Collaboration?
I welcome opportunities for research collaboration, academic discussions, and supervision in mathematics education and related areas.
Research Experience
Mathematics Education Research
Research in mathematics teaching and learning, students’ mathematical thinking, geometry education, and educational assessment.
Geometric Thinking Research
Research focusing on students’ geometric thinking using the Van Hiele model.
Quantitative Educational Research
Application of quantitative research methods in mathematics education and educational assessment.
Research Experience Timeline
2023 – 2025
Research Assistant
Mathematical Sciences Department,
Kumasi Technical University
(Part-time)
2015 – Present
Mathematics Educator
Senior High School Mathematics Teaching
and Examination (BECE & WASSCE)
2014 – 2025
MPhil Researcher
KNUST – Mathematics Education
(Completed: Nov 2025)
2014 – Present
Mathematics Education Researcher
Ongoing research in mathematics education,
geometry, and educational assessment.
Major Research Project
Van Hiele’s Geometric Thinking Level among Year Three Second-Cycle Students in Asante Akim South Municipality
This study investigated the geometric thinking levels of SHS3 students using the Van Hiele model. A total of 320 students from three senior high schools participated. Data were analysed using SPSS, and the findings revealed that the majority of students were at Level 2 (Analysis). Significant differences were found among schools.
View Research ProjectResearch Methods & Skills
- Quantitative Research Methods
- SPSS (Version 26)
- Statistical Analysis
- Survey Research
- Educational Assessment
- Research Design
- Data Interpretation
- Academic Writing
- Literature Review
- Project Management
Research Outputs
- Journal Articles (Published/Accepted)
- Conference Presentations
- Research Papers
- Books & Workbooks
- Academic Reports
Current Research Focus
- Mathematics Education
- Geometry Education
- Van Hiele Geometric Thinking
- Mathematics Teaching and Learning
- Educational Assessment
- Students’ Achievement and Attitudes in Mathematics
- Innovative Teaching Strategies
Research Collaboration
I welcome opportunities for research collaboration in mathematics education, geometry education, educational assessment, and related areas. Feel free to contact me.
Contact MePublications
Below are my research articles, conference papers, and other scholarly works in mathematics education and related areas.
1
Van Hiele Geometric Thinking Levels among Senior High School Students in Ghana: Evidence from the Asante Akim South Municipality
Type: Research Article
Journal: Applied Mathematics (Accepted, 2025)
2025
2
Gender Differences in Van Hiele Geometric Thinking Levels among Ghanaian Senior High School Students
Type: Research Article
Journal: (Under Review)
2025
3
School Context and Students' Geometric Thinking Levels: Evidence from Three Ghanaian Senior High Schools.
Type: Research Article
Journal: (In Preparation)
2024
4
Age and Geometric Thinking among Senior High School Students: A correlational study using the Van Hiele model.
Type: Research Article
Journal: (In Preparation)
2024
5
Database System Literacy and Mathematics Achievement Among Senior High School Students in the Asante Akim South Municipality: A quantitative Study.
Type: Research Article
Journal: (In Preparation)
2024
6
Van Hiele Geometric Thinking Levels as Predictors of Students' Performance in Metal Casting Projects in Technical Education Institutions
Type: Research Article
Journal: (In Preparation)
2024
7
Van Hiele Geometric Thinking Levels and Senior High School Students' Mathematical Modelling Competence in Analyzing Infant Mortality Trends: A Quantitative Study Using Data from Juaso Government Hospital
Type: Research Article
Journal: (In Preparation)
2024
Van Hiele Geometric Thinking Levels among Senior High School Students in Ghana
This paper examined the geometric thinking levels of senior high school students in Ghana using the Van Hiele model. The findings provide insights for improving geometry instruction in the second-cycle schools.
Gender Differences in Van Hiele Geometric Thinking Levels among Ghanaian Senior High School Students
The study investigated gender differences in geometric thinking levels using Usiskin's Van Hiele Geometry Test among senior high school students in Ghana.
Factors Influencing Students’ Geometric Thinking in the Second-Cycle Schools
This paper explored key factors that influence students’ geometric thinking levels, including teaching methods, learning resources, and prior knowledge.
Showing 3 conference papers.
No publications match the selected search and filters.
7Research Articles
0Books & Workbooks
3Conference Papers
1Accepted Paper
Research Output Types
- Journal Articles7
- Conference Papers3
- Books & Workbooks0
- Research Reports0
- Under Review1
Research Impact
- Contributes to mathematics education and geometry education
- Provides evidence for teaching and learning
- Supports educational assessment and instructional development
- Informs policy and practice in senior high schools
- Promotes the use of research in improving mathematics education
Interested in Collaborating on a Research Project?
I welcome opportunities for research collaboration, joint publications, and academic partnerships in mathematics education, geometry education, and related areas.
Research Interests
Mathematics Education
Teaching and learning of mathematics, curriculum, and pedagogy.
Geometry Education
Geometry teaching, learning, and curriculum development.
Geometric Thinking
Students' geometric thinking and the Van Hiele model.
Mathematics Teaching and Learning
Effective instructional strategies in mathematics.
Educational Assessment
Assessment strategies and measurement in mathematics education.
Formative Assessment in Mathematics
Classroom-based assessment for learning.
Educational Technology
Use of technology to enhance mathematics teaching and learning.
STEM Education
Integration of mathematics in STEM and interdisciplinary learning.
Learning Sciences
How students learn mathematics and develop mathematical understanding.
Teacher Education
Pre-service and in-service teacher education in mathematics.
Teachers' Professional Development
Teacher training, professional growth, and instructional improvement.
Mathematics Achievement
Factors influencing students' mathematics achievement.
Problem Solving
Mathematical problem solving and reasoning strategies.
Quantitative Research
Application of quantitative methods in educational research.
Secondary Mathematics
Teaching and learning at the second-cycle level.
Van Hiele Geometric Thinking
Investigation of Van Hiele levels and instructional interventions.
Research Focus Statement
My research interests lie in mathematics education, particularly in geometric thinking, teaching and learning, educational assessment, and the use of technology in mathematics education. I am also interested in teacher education, STEM education, and students' achievement in mathematics.
Key Themes
- Mathematics teaching and learning
- Students' geometric thinking (Van Hiele theory)
- Educational assessment (formative and summative)
- Technology-enhanced mathematics education
- Teacher education and professional development
- STEM education and interdisciplinary learning
- Quantitative educational research
- Mathematics achievement at the secondary level
Research Areas in Practice
- Design and validation of assessment instruments
- Data collection and statistical analysis (SPSS)
- Curriculum and instructional development
- Classroom-based research
- Intervention studies in geometry education
- Comparative studies among schools and student groups
- Publication of research findings
- Development of teaching and learning resources
Interested in Similar Research Areas?
I welcome opportunities for collaboration, research discussions, and supervision in mathematics education and related areas.
Research Projects
1
Van Hiele Geometric Thinking Levels among Senior High School Students in Ghana: Evidence from the Asante Akim South Municipality
This research investigates students' geometric thinking levels using the Van Hiele model. It examines the distribution of Van Hiele levels, gender differences, and differences among schools, and provides implications for mathematics teaching and learning.
2
Gender Differences in Van Hiele Geometric Thinking Levels among Ghanaian Senior High School Students
This study examines differences in students' geometric thinking levels using the Van Hiele model and explores factors that may account for the observed differences.
3
Factors Influencing Students’ Geometric Thinking in Senior High Schools
This research explores the instructional and contextual factors that influence students' geometric thinking levels in senior high schools.
4
Mathematics Achievement and Geometric Thinking
This study investigates the relationship between students' geometric thinking levels and their overall mathematics achievement in senior high schools.
5
Development of Teaching and Learning Resources in Geometry
This project involves the development of instructional materials and activities to enhance students' geometric thinking and understanding in line with the Van Hiele model.
Research Areas Covered
- Mathematics Education
- Geometry Education
- Van Hiele Geometric Thinking
- Mathematics Teaching and Learning
- Educational Assessment
- Gender Studies in Mathematics Education
- Quantitative Educational Research
Future Research Plans
- Intervention studies to enhance geometric thinking
- Longitudinal studies on students' progression through Van Hiele levels
- Technology-enhanced geometry instruction
- Teacher professional development in geometry education
- Comparative studies across different regions in Ghana
- Publication of a geometry teaching guide for SHS
Interested in Collaborating on a Research Project?
I welcome opportunities for research collaboration, joint publications, and academic partnerships in mathematics education, geometry education, and related areas.
Books, Workbooks & Educational Resources
A collection of learning materials designed to support Senior High School students, teachers, and learners in mathematics, physics and related subjects.
Featured Resources
Physics Notes for WASSCE
Type: Educational Book
Physics learning material designed to support SHS students preparing for WASSCE.
Price: $10.00
Mathematics Workbook
Type: Workbook
Mathematics practice materials with worked examples and WASSCE-style questions.
Price: Coming Soon
Coming Soon
View Details
Geometry Workbook
Type: Workbook
Geometry concepts with exercises, diagrams and WASSCE-style questions.
Price: Coming Soon
Coming Soon
View Details
WASSCE Revision Materials
Type: Study Guide
Comprehensive revision materials for SHS students preparing for WASSCE.
Price: Coming Soon
Coming Soon
View Details
Resource Categories
Physics
Notes, practice questions, revision materials
Mathematics
Workbooks, revision guides, past questions
Geometry
Concept notes, worked examples, exercises
Mathematics Education
Teaching resources, lesson notes, and guides
What You Will Get
- Concise and easy-to-understand notes
- Worked examples and step-by-step solutions
- Practice questions and exercises
- WASSCE-style questions
- Diagrams and real-life applications
- Revision tips and examination strategies
- Suitable for both students and teachers
Upcoming Resources
- Further Mathematics Workbook
- Mechanics and Vectors Notes
- Past Questions with Solutions (Physics & Mathematics)
- Teacher's Guide for SHS Mathematics
- Other subject-specific workbooks
Request a Resource or Collaboration
If you are a student, teacher or institution and would like to request a resource, partner on educational materials, or place a bulk order, feel free to contact me.
Online Tuition
Online mathematics and physics tuition is available for students seeking additional academic support, examination preparation, revision, and guided learning. Lessons are interactive, learner-centred, and tailored to help you achieve your academic goals.
Core Mathematics
SHS (Forms 1 – 3)
- Complete syllabus coverage
- Clear explanations and examples
- Problem solving and past questions
- Revision and exam preparation
- Support for BECE and WASSCE
Elective Mathematics
SHS (Forms 2 – 3)
- Advanced topics and applications
- Mechanics, Vectors, Statistics
- Past questions and solutions
- Exam strategies and revision
- WASSCE preparation
Physics
SHS (Forms 1 – 3)
- Detailed topic explanations
- Worked examples and exercises
- Past questions and revision
- Practical problem solving
- WASSCE preparation
Who Can Join?
- Senior High School students
- BECE candidates
- WASSCE candidates
- Students needing extra support
- Anyone interested in learning mathematics or physics
Mode of Teaching
- Live online classes (Zoom/Google Meet)
- Interactive lessons with real examples
- Digital notes and worksheets
- Past questions and practice tests
- Flexible scheduling
- One-on-one or small group sessions
Benefits
- Improve understanding and grades
- Learn at your own pace
- Get personalised support
- Access to quality learning materials
- Exam-focused training
- Build confidence in problem solving
Available Schedule
| Day | Time (GMT) | Session Type |
|---|---|---|
| Monday | 6:00 PM – 8:00 PM | Core Mathematics |
| Tuesday | 6:00 PM – 8:00 PM | Physics |
| Wednesday | 6:00 PM – 8:00 PM | Elective Mathematics |
| Saturday | 10:00 AM – 12:00 PM | Revision / Past Questions |
| Sunday | Flexible | One-on-One (by appointment) |
Note: Schedule can be adjusted to suit individual needs.
Fees
| Session Type | Fee (USD) |
|---|---|
| Group Session (per subject) | $10.00 |
| One-on-One Session | $20.00 |
| Monthly Package (4 weeks) | $60.00 |
Affordable rates with quality teaching and support.
Contact Me
For enquiries, special requests, or more information, feel free to contact me.
Learning Materials
Get access to notes, worksheets, and past questions during the lessons.
Sample MaterialsProfessional Experience
My professional experience spans teaching, academic leadership, examination work, and higher education, with a strong commitment to mathematics education and student development.
Sep 2022
– Present
– Present
Head of Mathematics Department
Serwaa Nyarko Girls' Senior High School, Kumasi, Ghana
Responsible for supporting mathematics teaching and learning, coordinating departmental academic activities, supporting assessment and examination preparation, and contributing to mathematics curriculum implementation.
Sept 2023
– Aug 2025
– Aug 2025
Part-time Lecturer
Department of Mathematical Sciences, Kumasi Technical University, Ghana
Taught undergraduate courses in mathematics and related fields, supported student learning, prepared teaching materials, and participated in academic activities.
2017 – 2022
Mathematics Educator
Barekese Senior High School, Kumasi, Ghana
Taught core and elective mathematics at the senior high school level, prepared students for internal and external examinations, and developed instructional materials.
2014 – 2017
Mathematics Educator
Bompata Presbyterian Senior High School, Kumasi, Ghana
Taught core and elective mathematics, prepared students for WASSCE, and supported student academic and personal development.
2014 – Present
Mathematics Examiner
WAEC & BECE, Ghana
Involved in the setting, marking, and moderation of mathematics examination scripts for BECE and WASSCE.
2012 – 2014
Research Assistant
Kwame Nkrumah University of Science and Technology (KNUST), Kumasi, Ghana
Supported research activities in mathematics education, data collection, analysis, and academic reporting.
Key Responsibilities
- Teaching and learning of mathematics
- Curriculum planning and implementation
- Student assessment and examination preparation
- Departmental leadership and coordination
- Development of learning materials and resources
- Mentoring and academic guidance
- Research and scholarly activities
Skills and Competencies
- Mathematics teaching and instructional design
- Assessment and examination expertise
- Curriculum development
- Academic leadership and management
- Research and data analysis (SPSS)
- Communication and mentoring
- Use of educational technology
- Teamwork and collaboration
Let's Collaborate
I am open to opportunities in teaching, research, examination work, curriculum development, and academic partnerships.
Academic Contact
Name:
Charles Siaw Obeng
Research Area:
Mathematics Education
Professional Role:
Mathematics Educator
Department:
Mathematics Department
Institution:
Serwaa Nyarko Girls' Senior High School
Location:
Kumasi, Ghana
Email:
Phone:
+233 24 123 4567 (Ghana)
+1 703 123 4567 (USA)
+1 703 123 4567 (USA)
ORCID:
Google Scholar:
ResearchGate:
Send Me a Message
Use the form below to send an email or enquiry.
Location
Serwaa Nyarko Girls' Senior High School
Kumasi, Ghana
Serwaa Nyarko Girls' Senior High School
Kumasi
Let's Collaborate
If you are interested in research collaboration, student supervision, academic projects, or any other enquiry, feel free to contact me.
Curriculum Vitae
My curriculum vitae provides detailed information about my academic background, professional experience, research activities, publications, and other scholarly contributions.
Professional Summary
A dedicated mathematics educator and researcher with experience in teaching, academic leadership, research, and curriculum development. Passionate about improving mathematics education, promoting geometric thinking, and supporting student success through evidence-based teaching and learning.
Academic Qualifications
- MPhil Mathematics Education
- MSc Mathematics
- BSc Mathematics
- Certificate in Education
- HND Mechanical Engineering
Professional Experience
Head of Mathematics Department
Serwaa Nyarko Girls' Senior High School
Mathematics Educator
Senior High School (Various Institutions)
Part-time Lecturer
Department of Mathematical Sciences
Mathematics Examiner
WAEC & BECE
Research Assistant
KNUST / Research Projects
Research Profile
- Mathematics Education
- Geometry Education (Van Hiele)
- Educational Assessment
- Teaching and Learning
- STEM Education
- Quantitative Research
Teaching and Academic Activities
- Teaching core and elective mathematics
- Curriculum development
- Student assessment and examination preparation
- Supervision and academic mentoring
- Workshop and seminar facilitation
- Development of learning materials
Skills and Competencies
- Mathematics teaching and instructional design
- Research and data analysis (e.g., SPSS)
- Academic writing and publication
- Curriculum planning and implementation
- Leadership and team coordination
- ICT integration in teaching and learning
- Communication and interpersonal skills
Selected Publications
I have published research articles in international journals and conference proceedings in the areas of mathematics education, geometric thinking, and educational assessment.
Academic Profiles
References
References are available on request.
Contact / Collaboration
I am open to research collaboration, academic partnerships, and other professional opportunities.