Research Paper Example: Readability of Reading Passages in the MEB 9th Grade English Textbook: A Flesch-Based Analysis

Readability of Reading Passages in the MEB 9th Grade English Textbook: A Flesch-Based Analysis

Introduction

1.1 Background of EFL textbook readability

Readability is a critical factor in English as a Foreign Language (EFL) instruction because it directly influences learners’ comprehension, motivation, and academic success (Başaran, 2026). Appropriate matching of text complexity to student proficiency supports vocabulary acquisition and facilitates deeper understanding (Başaran, 2026). Moreover, textbook readability has been shown to affect learners’ self-efficacy and classroom performance, as overly complex passages often lead to comprehension breakdowns and disengagement (Thapaliya, 2019). Despite these stakes, formal adoption processes in many educational systems prioritize content coverage over empirical readability testing, potentially widening the gap between text demands and learner abilities (Thapaliya, 2019).

1.2 Research gap and objectives

Although prior analyses have examined pedagogical design and physical features of EFL textbooks (Thapaliya, 2019), quantitative assessment of reading passages using established readability indices remains scarce. In Turkey, the official MEB 9th Grade English textbook is the primary source in secondary classrooms, yet its reading materials have not been empirically tested by the Flesch Reading Ease (FRE) and Flesch-Kincaid Grade Level (FKGL) formulas. This study therefore aims to:

• Calculate FRE and FKGL scores for all reading passages in the MEB 9th Grade English textbook.
• Determine the average readability levels and corresponding U.S. grade equivalents.
• Evaluate alignment between calculated readability levels and ninth-grade proficiency expectations.

1.3 Research questions

• RQ1: What are the Flesch Reading Ease scores of the reading passages in the MEB 9th Grade English textbook?
• RQ2: To which Flesch-Kincaid Grade Levels do these passages correspond?
• RQ3: How do the measured readability levels align with the expected proficiency of ninth-grade learners?

Literature Review

2.1 Definition of readability

Readability is defined as the ease with which readers can understand written material, determined by factors such as vocabulary complexity, sentence structure, and syllable counts (Başaran, 2026). It serves as a key pedagogical consideration in selecting and adapting instructional texts to learner abilities.

2.2 FRE and FKGL formulas

The Flesch Reading Ease (FRE) and Flesch-Kincaid Grade Level (FKGL) formulas are among the most widely adopted English readability indices, quantifying text difficulty based on sentence length and word syllables (Flesch & Kincaid, 1970s). The FRE score is computed as:

FRE = 206.835 – 1.015 × (words/sentences) – 84.6 × (syllables/words)

Higher FRE scores indicate easier texts. The FKGL formula estimates the U.S. school grade level required for comprehension:

FKGL = 0.39 × (words/sentences) + 11.8 × (syllables/words) – 15.59

For example, an FKGL of 8 suggests that an eighth-grade reader can comfortably understand the text (Flesch & Kincaid, 1970s). While these formulas are validated in English L1 contexts, careful interpretation is needed in EFL settings due to differences in vocabulary familiarity and syntactic norms (Başaran, 2026).

2.3 Previous EFL textbook readability studies

Thapaliya’s (2019) investigation of a Grade Nine English textbook in Nepal addressed academic and physical quality but did not include quantitative readability metrics. In European contexts, Başaran (2026) compared AI-based readability assessments with traditional formulas in German textbooks, finding strong correlations yet underscoring the importance of language-specific validation. These studies highlight a gap in empirical readability analysis for EFL materials, particularly in Turkish secondary education.

Methodology

3.1 Research design

This study employs a quantitative descriptive design to analyze text-based data without involving human participants. This non-experimental approach allows systematic evaluation of textual complexity and provides objective benchmarks for material selection (Flesch & Kincaid, 1970s).

3.2 Data source

The data comprise all reading passages extracted from the official MEB 9th Grade English textbook, as prescribed by the Turkish Ministry of National Education.

Note: This section includes information based on general knowledge, as specific supporting data was not available.

3.3 Instruments

Readability was measured using the FRE and FKGL formulas, implemented manually and via spreadsheet scripts that follow the algorithms specified by Readable.com (Flesch & Kincaid, 1970s). These indices quantify text complexity based on sentence length and word syllables.

3.4 Data collection and analysis

Each passage was segmented into sentences and words; total syllables were counted according to standard English pronunciation rules. FRE and FKGL scores were computed for every passage. Descriptive statistics—including mean, range, and distribution—summarized the corpus’s readability profile. Results will inform whether the textbook’s reading materials align with ninth-grade proficiency standards.

References

Başaran, B. (2026). Enhancing readability assessment for language learners: A comparative study of AI and traditional metrics in German textbooks. European Journal of Educational Research, 15, 101–119. https://doi.org/10.12973/eu-jer.15.1.101

Flesch, R., & Kincaid, J. P. (1970s). Flesch Reading Ease and the Flesch Kincaid Grade Level. Readable.

Thapaliya, K. (2019). An analysis of Grade Nine English textbook of Janak [Unpublished master’s thesis]. Tribhuvan University.