Lesson at a Glance
This lesson follows the WIPPEA model from the CAELA Guide for Adult ESL Trainers (III-C: Effective Lesson Planning), based on Madeline Hunter's Direct Instruction Model (1982). The seven stages are: Warm-Up/Review → Introduction → Presentation → Guided Practice → Communicative Practice → Evaluation → Application. Each stage has a clear purpose, appropriate grouping strategy, activity type, and timing. The lesson objective is written in the CAELA format: "Students will be able to [communicative task] in order to [real-life purpose] as evidenced by [evaluation method]."
10 min
10 min
25 min
Practice
20 min
Practice
20 min
20 min
15 min
The Voynich Manuscript: History, mystery, and methods of inquiry
High Intermediate – Advanced (B2–C1 CEFR)
Reading, Listening, Speaking (with integrated Writing in Application)
120 minutes
10–25 adult learners
Individual → Pairs → Small groups → Whole class
Students will be able to discuss competing theories about an unsolved historical mystery using evidence from multiple sources, in order to participate in academic conversations and evaluate arguments critically, as evidenced by a structured group discussion and a written evaluation of one theory using hedging language appropriately.
Warm-Up / Review
Purpose: Activate students' prior knowledge; establish the communicative context; generate interest and motivation before new material is introduced.
Pairs → Whole classActivity: Round Robin — "The Traveler" analogy
Open with the CAELA traveler analogy to frame lesson planning and research approaches. Tell students:
"Imagine three people trying to solve a mystery. Person A has read everything, has a full plan, and knows exactly where to start. Person B has a rough idea and one lead to follow. Person C woke up this morning and decided to start solving today. Which person are you when you face a problem you've never seen before?"
Students discuss in pairs (2 min), then share (2 min whole class). Teacher briefly links all three styles to how the manuscript has been researched.
Prior Knowledge Activation — Quick Think
Ask the whole class (elicit, do not lecture): "Has anyone heard of the Voynich Manuscript? What do you know about unbreakable codes or undeciphered languages?" Write key student ideas on the board. These will be revisited at the Evaluation stage.
Introduction
Purpose: Connect warm-up to new content; introduce the lesson objective explicitly; pre-teach critical vocabulary; frame the three sources students will encounter.
Whole class1. State the Objective (2 min)
Write the objective on the board in student-friendly language: "Today we will read, watch, and discuss theories about the Voynich Manuscript so that we can evaluate arguments and practise academic discussion using hedging language." Tell students what the three sources are and what role each plays.
2. Pre-Teach Vocabulary (8 min)
Present the eight key terms using context sentences drawn directly from the sources. Students match each word to its definition in pairs, then check whole-class. Do not over-explain — students will encounter the words in context.
| Word | Part of Speech | Meaning in context |
|---|---|---|
| manuscript | noun | A book or document written by hand, before printing |
| cipher | noun | A system of writing in which letters or symbols represent other letters |
| vellum | noun | Fine parchment made from animal skin, used for important documents |
| decipher | verb | To convert a coded or unclear text into readable language |
| cryptographer | noun | A person who studies or designs codes and ciphers |
| herbal | noun | A medieval book describing plants and their medicinal uses |
| conjecture | noun | An opinion or theory without sufficient evidence; an educated guess |
| provenience | noun | The origin or source of an artefact (used in archaeology/history) |
Presentation — New Language and Concepts
Purpose: Deliver new content through three differentiated input channels (video → reading A → reading B), each progressively deeper. Include comprehension checks after each input segment.
Source 1 — Video Input (10 min) · Individual then Pairs
IndividualPlay the TED-Ed video (4:43). Students watch with a specific listening task: "Note three facts and one theory you hear." Do not pre-explain the video content.
▶ TED-Ed: "The world's most mysterious book" — Stephen Bax (4:43)
Source 2 — Reading A: Tiltman's NSA Report (8 min) · Individual
Individual → PairsStudents read the summary below silently. While reading they underline: (a) one fact, (b) one inference, (c) one word that signals uncertainty. Then compare with a partner.
Brigadier John H. Tiltman was one of Britain's greatest codebreakers. He spent over 25 years studying the Voynich Manuscript. His 1967 paper identifies three published decipherment claims — all rejected by scholars. Newbold (1921) argued Roger Bacon wrote it and had possessed a telescope centuries before its invention; his method was shown to be too subjective to yield a single verifiable text. Feely (1943) produced medieval Latin rejected as inauthentic. Strong (1946) identified the author as Anthony Askham and produced medieval English — equally unacceptable.
Tiltman's own analysis of 17 symbols found consistent patterns: paragraphs nearly always begin with specific symbols; spaces between "words" may not indicate actual word boundaries; certain groups appear to carry grammatical functions like endings or suffixes. He concluded that simple letter-for-symbol substitution is impossible because "languages simply do not behave this way." His tentative hypothesis: the text may represent a primitive synthetic universal language — a philosophical classification of ideas — similar to systems developed by Bishop Wilkins (1667) and Cave Beck (1657).
Source 3 — Reading B: D'Imperio's Monograph (7 min) · Jigsaw
Jigsaw (groups of 3)Following the CAELA Jigsaw Reading technique: divide students into groups of three. Each person reads one extract below and prepares to teach the main idea to their group in 60 seconds.
D'Imperio surveyed all scholarly opinion. Most researchers — including Tiltman, Panofsky, and Friedman — concluded the manuscript is not a hoax. It is "a homogeneous, creative work of a serious scholar." Only Brumbaugh dissented, claiming it was a forgery to fool Emperor Rudolph II. Even he admitted there may be an underlying text.
The manuscript entered recorded history in 1665 when Marci sent it from Prague to Kircher in Rome. Before that: Rudolph II's court (before 1608), then Jacobus de Tepenecz (his erased signature, visible under UV light, confirms this). Found by Voynich at Villa Mondragone, Italy, in 1912. Now at Yale, catalogued MS 408.
Captain Currier found at least two different "hands" (writers) and possibly two "languages" in the manuscript. The text follows consistent internal rules throughout. Statistical patterns do not match simple substitution ciphers. No punctuation. Spaces may not mark word boundaries. These facts must be explained by any theory.
Guided Practice
Purpose: Provide highly structured activities that help students work with the new language; check understanding of all three sources through scaffolded questions. Teacher circulates and monitors.
Individual (self-correcting)Complete the quiz individually. The quiz covers all three sources. Read each question carefully and select the best answer. After submitting, review feedback with your partner.
Communicative Practice
Purpose: Allow students to integrate new language with previously acquired skills in interactive, authentic settings — moving away from teacher-controlled input toward student-generated output. Activities are less controlled than Guided Practice.
Small groups of 3–4 → Whole class report-outActivity: Fact / Inference / Speculation — Information Gap
Each group receives the five claims below. Together they classify each as: Confirmed Fact (the source states it directly), Inference (a logical conclusion from evidence), or Speculation (no solid evidence; possible but unconfirmed). Groups must cite which source supports their classification.
- "The manuscript was written around 1420."
- "Roger Bacon wrote the Voynich Manuscript."
- "The manuscript was in Rudolph II's court before 1608."
- "The text contains meaningful content, not random nonsense."
- "The manuscript may represent a universal language system."
10 minutes group discussion · 5 minutes report-out · 5 minutes whole-class discussion
Language Focus — Hedging (integrate while reporting)
As groups report out, teacher models and reinforces hedging expressions. Write these on the board and ask students to use at least one when making a claim:
- "The evidence suggests that…"
- "It appears that…, although…"
- "This may indicate that…"
- "While X cannot be ruled out, the balance of evidence…"
- "Tiltman's analysis indicates…, but this remains tentative."
Evaluation
Purpose: Teacher and students assess whether the lesson objective has been met. Evaluation must match the language skill proficiency focus (speaking and reading). This stage is performance-based, not pen-and-paper.
Pairs → Whole classTask A — Decipherment Theory Comparison (10 min) · Pairs
Students use the table below and their notes from all three sources to complete a mini oral presentation to their partner: "I think [Researcher]'s theory is / is not convincing because [evidence], and the evidence suggests that [hedge]." Each partner speaks for 90 seconds.
| Scholar | Year | Claimed author | Method | Verdict (use hedging) |
|---|---|---|---|---|
| Newbold | 1921 | Roger Bacon | Microscopic strokes = Greek shorthand | Refuted — Manly (1931) |
| Feely | 1943 | Roger Bacon | Unmethodical Latin substitution | Rejected by scholars |
| Strong | 1946 | Anthony Askham | Undisclosed key → medieval English | Key never revealed; rejected |
| Brumbaugh | 1974–76 | Unknown forger | Deliberate hoax with planted clues | Minority view; not accepted |
| Tiltman | 1951–67 | Unknown | Statistical analysis → universal language? | Hypothesis; respected |
| Bax (video) | 2014 | Unknown | Proper nouns as anchors | Partial (~10 words proposed) |
Task B — Open Written Questions (10 min) · Individual
Students answer two of the three questions in writing (4–6 sentences each). This is the primary evaluation artifact.
Sources: Video + Tiltman (1967)
Stephen Bax (video) and Brigadier Tiltman both tried to decode the manuscript but used completely different approaches. In your own words, explain how their methods differ and what each approach assumes about the nature of the text. Use at least one hedging expression.
Sources: D'Imperio (1978) + Tiltman (1967)
D'Imperio reports that virtually every serious scholar concluded the manuscript is not a hoax — but Brumbaugh disagreed. Whose position do you find more convincing, and why? Use specific evidence from at least two sources and at least two hedging expressions.
Source: D'Imperio (1978)
Captain Currier found evidence of at least two different "hands" (writers) in the manuscript. If confirmed, what are three implications this would have for existing theories about who wrote the manuscript and why? Use hedging language in each implication.
Application
Purpose: Tasks reflect real-life applications of the lesson objective. Students transfer what they have learned to a new, authentic context — moving beyond the classroom material to demonstrate genuine communicative competence.
Individual (in-class) → Take-home optionIn-Class Task — 150-word Position Paragraph
Write one academic paragraph responding to this question: "After more than 600 years and dozens of failed attempts, should scholars continue trying to decode the Voynich Manuscript? Why or why not?"
The paragraph must include:
- A clear topic sentence with your position
- Evidence from at least two of the three sources
- At least three different hedging expressions
- One use of the passive voice for academic reporting (e.g. "It has been argued that…")
Wrap-Up — Return to Warm-Up (5 min)
Return to the board from the Warm-Up stage. Ask students: "What did you know at the start? What do you know now? What question do you still have?" This closes the lesson and models reflective thinking — a key CAELA skill.
Take-Home Application Activities (CAELA III-C)
Students select one of the following to complete before the next class:
- Find another unsolved mystery (a historical artefact, an unexplained text, an unsolved scientific question). Write a short comparison: how is the investigation similar to or different from the Voynich Manuscript research?
- Lesson Reflection: Write 3–5 sentences answering — What went well in your understanding today? What was most challenging? What would you still like to investigate?
- Research extension: Find one news article published after 2015 about the Voynich Manuscript. Summarise it in 100 words and bring it to the next class. Be ready to evaluate whether the claim in the article is a fact, inference, or speculation.
- Bax, Stephen. "The world's most mysterious book." TED-Ed, 2014. youtube.com/watch?v=8NS4CbBJQ84
- Tiltman, J.H. "The Voynich Manuscript: 'The Most Mysterious Manuscript in the World.'" NSA internal paper, 1967. Declassified under FOIA, 2002. (DOCID: 631091)
- D'Imperio, M.E. The Voynich Manuscript: An Elegant Enigma. National Security Agency / Central Security Service, 1978.
Framework: Center for Applied Linguistics. (2007). The CAELA Guide for Adult ESL Trainers: III-C Effective Lesson Planning for Adult English Language Learners. Washington, DC: CAL. Based on Hunter, M. (1982). Mastery teaching. TIP Publications.
On the interactive quiz: The quiz distinguishes between recall, analysis, and critical thinking questions. Do not skip the critical-thinking questions even with B2 students. The hardest questions often produce the best discussion. If a student chooses wrong, ask them to read the source again and identify where their reasoning diverged from the text.
On hedging language: This is the core linguistic focus of the lesson. Monitor the Application stage writing closely for inappropriate certainty: students should not write “the Voynich Manuscript is a hoax” but rather “it may be a hoax” or “the evidence appears to suggest.” This is academic writing at B2–C1 level and it matters professionally.
On the sources: Tiltman (1967) and D’Imperio (1978) are primary scholarly sources. Students should understand that these are not Wikipedia — they are the same kind of document your teacher publishes in the Principia Orthogona series. Reading them is an act of intellectual respect for the tradition they represent.
For stronger students: Ask them to write a CAELA-format lesson objective for the Voynich lesson itself, then compare it to the one in the lesson header. Does it meet the four-element standard (C, CT, P, E)?