Article types accepted

• Research article — 3,000–8,000 words excluding references
• Review article — 5,000–12,000 words (systematic, scoping, or narrative reviews)
• Case study — 2,000–4,000 words, including teaching cases and applied implementations
• Short communication — 1,500–3,000 words for time-sensitive findings
• Editorial — 800–1,500 words, by invitation from the Editor-in-Chief
• Book review — 800–1,500 words

Manuscript structure

1. Title page — title, authors, affiliations, ORCID iDs, corresponding author
2. Abstract — 150–300 words, structured (Background, Methods, Results, Conclusions)
3. Keywords — 3–8 terms
4. Introduction
5. Methods
6. Results
7. Discussion
8. Conclusion
9. Declarations — conflict of interest, data availability, funding, ethics approval (where applicable)
10. References

Language and abstracts

Manuscripts may be submitted in Khmer, English, or bilingually (a primary language with secondary support). Regardless of primary language:

• Khmer and English abstracts are required for every submission
• Khmer and English titles are required
• Khmer keywords are optional when the primary language is English

Formatting

• A4 page size with 2.5 cm margins
• Khmer text — Khmer OS Battambang or Khmer OS Siemreap, 12 pt
• English text — Times New Roman or Calibri, 12 pt
• 1.5 or double line spacing
• Line numbers in the left margin (required for review)
• Tables and figures may be inline or separate; provide clear captions and refer to them in the text

Reference style

CJES accepts both APA 7th edition (for education and social sciences) and Vancouver (for medical and health sciences). Use one style consistently throughout the manuscript. Reference managers such as Zotero, Mendeley, or EndNote are strongly recommended. Include DOIs or URLs where available.

Notation and statistics

CJES follows APA-7 / ICMJE style for statistical reporting. Apply these rules in the abstract, tables, and body text:

• Italicise statistical symbols: *p*, *t*, *F*, *M*, *SD*, *N*, *n*, *r*, χ², *d*
• Omit the leading zero on values that cannot exceed 1 (p, r, β) — write *p* < .001, not *p* < 0.001
• Add a space around comparison operators — write *p* < .001, not p<.001
• Report exact p-values when p ≥ .001 — write *p* = .034, not *p* < .05
• Test names — Paired-samples *t*-test · Independent-samples *t*-test · One-way ANOVA · Pearson's *r*
• Means — write *M* = 29.90 (APA) or Mean = 29.90, but be consistent within the manuscript
• Report Cohen's *d* for effect sizes

Example of correct in-text reporting:

"After the intervention, the experimental group scored significantly higher (*M* = 29.90, *SD* = 3.96) than the control group (*M* = 23.67, *SD* = 7.57), *t*(58.85) = 4.61, *p* < .001, Cohen's *d* = 1.02."

On accepted manuscripts, our production editors run an automated APA-style copyedit that normalises notation before Online First publication. Authors following this section reduce the number of post-acceptance changes needed.

Tables, figures, and supplementary materials

• Number tables and figures sequentially; cite each in the text
• Minimum 300 dpi for raster images; vector formats (SVG, EPS) preferred for line art
• Captions must contain sufficient information for stand-alone interpretation
• Supplementary materials (data, code, video, supplementary methods) submitted as separate files

Related guides

• Workflow

  Submission process

  What to prepare before submitting, the stages your manuscript will move through, and the timelines you can expect at each step.

• Fees

  Publication charges

  CJES is a diamond open-access journal — authors pay no charges of any kind, and readers access all articles freely. There are no APCs, no submission fees, and no hidden charges.

• Templates

  Manuscript templates

  Download pre-formatted Word templates for every CJES article type. The templates include the required structure and font choices for both Khmer and English.