Six mathematics lessons that a practising teacher planned and taught to a Junior Secondary School 1 (JSS1) class in Nigeria in the 2025/26 school year, following the national NERDC curriculum. Each lesson is here as the teacher wrote it, as a cleaned transcription, as structured JSON, and as a declared XML document valid against a RELAX NG grammar. The three lessons that ended in a class exercise also carry the learners' de-identified, marked answers.

This is one of four datasets released with the LPCG framework from the MSc study Design and Evaluation of a Lesson-Plan-Driven Framework for Curriculum-Constrained Generation and Personalisation of Learning Materials: A Case Study of Nigerian Junior Secondary Mathematics (University of Lagos, 2026). The framework generates revision material from these lessons; ng-jss1-math-alignment-ratings holds what it generated.

165 files, 2.4 MB.

Lessons

lesson	term, week	topic	objectives	steps	class work
`t2-w09`	second term, week 9	Simplification of Algebraic Terms	3	5	yes
`t3-w02`	third term, week 2	Plane Shapes (2-D Shapes)	3	5	yes
`t3-w04`	third term, week 4	Three Dimensional Shapes	2	4
`t3-w05`	third term, week 5	Three dimensional shapes II	2	4	yes
`t3-w06`	third term, week 6	Construction	5	6
`t3-w09`	third term, week 9	Need for statistic	2	4

path	what it holds
`lessons/steps.csv`	one row per lesson step: its lesson, objective, planned content and minutes, with the path to the lesson document, the step's note, the cleaned transcription and the class work. Built from the files below; it adds nothing to them
`lessons/<lesson>.xml`, `lessons/lesson.rng`	each lesson as a declared document — objectives, steps and activities, with the notes each step draws on pinned by SHA-256 — and the grammar it is valid against
`notes/<lesson>/`	the lesson notes as the generator read them: transcribed, then corrected by hand
`transcripts/<lesson>/teacher.md`	the teacher's plan, transcribed as written
`transcripts/<lesson>/teacher-cleaned.md`	the same plan cleaned for reading; how it was read and corrected is recorded beside it
`transcripts/<lesson>/session-plan.json`	the plan as structured JSON
`transcripts/<lesson>/note.md`, `transcripts/<lesson>/notes/`	the lesson note as transcribed
`transcripts/<lesson>/classwork.md`, `classwork.xml`, `student-NN.md`	for the three lessons with class work: the exercise, each learner's transcribed and marked answers, and the same structured as XML
`transcripts/_render/`	typeset renders of the transcriptions (PDF and PNG)
`transcripts/SCHEMA.md`	how a transcription is laid out
`coding/student_work.json`	19 student activities coded for whether each sets work, with the reason and whether a second reading agreed
`coding/note_headings.json`	45 note headings coded by kind, including whether the region sets work, with the steps each belongs to
`coding/selection_set.json`	four authored lessons, not the teacher's, on which design choices were made, so that none was tuned on the six lessons the study measures
`PROVENANCE.json`	every file with its SHA-256, the repository commits it was read from, and which files differ from the study's record

The XML is the authoritative form

The transcriptions are the master record, but the XML documents are what the study's generator read. They declare sets_work — which student activities set work — and that judgement was never in the transcriptions, so a plan rebuilt from the transcriptions alone differs from the one the study used. Each declared document is a migration of its plan, not a copy: across the six lessons there are 69 differences of format, 4 places where the declaration corrects the transcription, and 11 where the two disagree. Only one lesson, the pilot t3-w05, projects exactly.

What differs from the study's record

24 of the 165 files differ from the study's own record, and PROVENANCE.json marks each one.

The school is not named. Where the study's record carried its abbreviation — in session ids and in file references — this release has sch.
Each classwork.xml states the basis on which it is released, in place of an internal note.
Two images that set a photograph of a page beside its transcription are not released. Every image that is released is a typeset render.

Consent and privacy

The school's permission covers the publication of the teacher's plans and of the class work. Learners appear only as student-01 to student-09: their names were covered before the work was photographed, and no key links an id to a child. The photographs the class work was transcribed from are not released.

Limitations

One teacher, one class, six lessons, JSS1 mathematics only.
Plans and class work were transcribed from photographs. Uncertain readings are marked in the transcriptions and should be read as uncertain.
The three lessons with class work cover at most nine learners.

Related datasets

ng-jss1-math-curriculum: the curriculum and scheme of work the lessons follow
ng-jss1-math-textbook-linkage: an open JSS1 textbook linked to the curriculum's objectives
ng-jss1-math-alignment-ratings: what the framework generated from these lessons, and how it was rated

Citation

@mastersthesis{amuda2026lpcg,
  author = {Amuda, Tosin},
  title  = {Design and Evaluation of a Lesson-Plan-Driven Framework for Curriculum-Constrained Generation and Personalisation of Learning Materials: A Case Study of Nigerian Junior Secondary Mathematics},
  school = {University of Lagos},
  type   = {MSc dissertation},
  year   = {2026}
}