Evaluating the effectiveness of organic chemistry component of the Ghanaian high school chemistry curriculum

Technical Summary: Evaluating the Effectiveness of the Organic Chemistry Component of the Ghanaian High School Chemistry Curriculum

Problem Statement
Despite the critical role of organic chemistry in equipping students with foundational frameworks for advanced scientific study, empirical evidence consistently indicates that learners in Ghanaian Senior High Schools (SHS) struggle with core concepts such as IUPAC nomenclature, reaction mechanisms, and functional group identification. While previous research has documented these learning difficulties, there is a paucity of studies systematically evaluating the organic chemistry component of the curriculum itself to determine whether these challenges stem from the curriculum's inherent structure or from implementation issues. This study addresses this gap by applying a comprehensive evaluation framework to the organic chemistry component of the Ghanaian SHS chemistry curriculum.

Methodology
The study employed a convergent mixed-methods design (specifically the data-transformation variant) grounded in Stufflebeam's CIPP (Context, Input, Process, Product) evaluation model.

• Participants: The sample consisted of 226 Form Three science students from four public Senior High Schools in the Cape Coast Metropolis, Ghana. The selection was purposive, targeting schools where the organic chemistry syllabus had been fully covered. The demographic breakdown included 180 males (79.6%) and 46 females (20.4%).
• Instrumentation: Data were collected via the Students' Questionnaire on Organic Chemistry Curriculum Evaluation (SQOCCE), a researcher-developed instrument based on the national curriculum and relevant literature. The instrument utilized a six-point Likert scale for 37 closed-ended items distributed across the four CIPP dimensions (12 Context, 6 Input, 9 Process, 10 Product) and included two open-ended items for qualitative data.
• Data Analysis:
  • Quantitative: Descriptive statistics (frequencies, means, standard deviations) summarized perceptions. Inferential statistics included independent-samples t-tests to examine gender differences and a three-way ANOVA to analyze main and interaction effects of gender, grade level, and school type.
  • Qualitative: Responses to open-ended items were analyzed using open coding and constant comparative analysis to identify recurring themes. These themes were subsequently quantified (frequency counts) to facilitate integration with quantitative findings.
  • Evaluation Framework: Mean scores were categorized into three levels: Insufficient (1.0–2.7), Moderate (2.8–4.4), and Sufficient (4.5–6.0).

Key Results
The study yielded the following findings regarding the four CIPP dimensions and demographic variables:

1. Context Dimension (Moderate Effectiveness): Students perceived the curriculum's relevance and alignment with learning needs positively. The average mean score was 4.03, indicating that students recognize the importance of organic chemistry for future academic and career pursuits and its applicability to real-world phenomena.

2. Input Dimension (Moderate/Low Effectiveness): This dimension recorded the lowest average mean score (3.24), signaling significant weaknesses. Students reported inadequate instructional resources, including a lack of well-equipped laboratories, insufficient organic chemicals, a scarcity of teaching models, and a shortage of textbooks. Furthermore, perceptions regarding teachers' use of structured lesson plans were low.

3. Process Dimension (Moderate Effectiveness): The average mean score was 3.53. While students acknowledged the regular use of assessments and feedback, they reported a heavy reliance on lecture-based teaching methods. There was a low perception of active student involvement and the use of instructional strategies that facilitate participation.

4. Product Dimension (Moderate Effectiveness): With an average mean score of 3.67, students indicated that learning organic chemistry helped stimulate interest and foster positive attitudes. They demonstrated an understanding of the relevance of organic compounds in daily life, though the application of concepts to other areas of chemistry was perceived as moderate.

5. Demographic Differences:

   • Gender: An independent-samples t-test revealed a statistically significant difference in perception scores, with male students (M = 135.07) reporting more positive perceptions than female students (M = 123.30), t(224) = 2.594, p = .001. However, the effect size was small (η² = .037), suggesting gender accounts for only 3.7% of the variance.
   • School Type: A one-way ANOVA indicated a significant difference in perceptions based on school type (p = .003). Post-hoc tests showed that students in "endowed" schools had significantly higher perception scores than those in "less endowed" schools.
   • Grade Level: No significant main effect was found for grade level (p = .762).
   • Interactions: While a significant two-way interaction was found between grade level and school type, the three-way interaction among gender, grade level, and school type was not significant.

6. Qualitative Challenges: Students identified three primary challenges:

   • Abstractness: Concepts are perceived as complex, broad, and invisible to the naked eye.
   • Resource Deficits: A lack of models, reagents, and solutions hinders visualization and understanding.
   • Pedagogical Needs: A strong demand for practical-based teaching to make abstract concepts concrete.

Key Contributions

• Curriculum Evaluation: The study provides one of the few systematic evaluations of the organic chemistry component of the Ghanaian curriculum using the CIPP model, moving beyond student performance metrics to assess the curriculum's structural and implementation components.
• Diagnostic Insight: It identifies that while the curriculum's objectives (Context) and outcomes (Product) are generally aligned with student needs, the implementation is hindered by deficits in Input (resources) and Process (pedagogy).
• Gender and Equity: The study contributes data on gender disparities in curriculum perception, noting that while males perceive the curriculum more positively, the effect size is small, suggesting that broader systemic factors (like resource allocation) are more influential than gender alone.
• Methodological Application: It demonstrates the utility of the CIPP model in diagnosing specific gaps in science education within a developing context, validating its applicability to chemistry education in Ghana.

Significance and Claims
The authors claim that the study offers transferable insights for educators and policymakers, particularly regarding the necessity of resource allocation and pedagogical reform. The paper argues that the abstract nature of organic chemistry is not solely an intrinsic difficulty of the discipline but is exacerbated by the conditions of its teaching—specifically the lack of practical experiences and visual aids.

The study advocates for:

1. Improved Resource Allocation: Ensuring laboratories are stocked with essential organic chemicals and teaching models.
2. Pedagogical Shift: Integrating practical, inquiry-based lessons to replace or supplement lecture-heavy approaches.
3. Equitable Implementation: Addressing the disparities between endowed and less-endowed schools to ensure all students have access to the necessary inputs for effective learning.

The authors conclude that while the organic chemistry curriculum is perceived as moderately effective, its overall impact is compromised by weaknesses in the input and process dimensions. The study positions the CIPP model as a robust, decision-oriented tool for generating the evidence necessary to refine the curriculum and support evidence-based policy-making in Ghanaian science education.