Teacher Master Key • Lessons 170 & 171

Section 1: Germanic Sound Shift of <gh> & Greek Digamma <ph>

Historical Orthoepy

The Germanic Labial Shift (<gh> = /f/):
• In Old English, words like tōh, rūh, hleahhan ended in a velar fricative (/x/). As Middle English evolved, this velar sound shifted to a labiodental fricative (/f/) in certain words (tough, rough, cough, laugh, enough).
• In other words, the sound was completely lost, resulting in silent -gh (bough, though, through, sigh, high). Wheeler systematically contrasts both groups!

Greek Roots & Classical <ph> = /f/:
• Greek Phi (Φ, φ): Originally an aspirated voiceless bilabial stop (/pʰ/), it spirantized to /f/ in Hellenistic Greek and Latin transcription.
• Classical Vocabulary: phlox (flame), phrase (diction), photograph (light-drawing), orphan (bereaved), cipher (Arabic sifr via Latin/Greek).
• Proper Nouns: Philip and Phœbe require initial capitalization and classical digraph retention.

Section 2: Complete Word Analysis & Phonetic Key (15 Words)

IPA • Orthography • Etymology

Word	IPA	Etymological Origin & Phonological Structure	Word	IPA	Etymological Origin & Phonological Structure
tough	/tʌf/	OE tōh; velar fricative shifted to labial /f/	phrase	/freɪz/	Greek phrasis (speech); digraph ph = /f/; voiced s = /z/
rough	/rʌf/	OE rūh; vowel shortened to /ʌ/; gh = /f/	nephew	/ˈnɛfjuː/	OF neveu; Latin nepos; medial ph pronounced /f/
cough	/kɔːf/	ME coughen; vowel /ɔː/; final gh = /f/	photograph	/ˈfoʊtəɡræf/	Greek phos (light) + graphe (writing); two ph = /f/
laugh	/læf/	OE hleahhan; vowel /æ/; final gh = /f/	Philip	/ˈfɪlɪp/	Proper noun; Greek Philippos (lover of horses)
enough	/ɪˈnʌf/	OE genōh; unstressed prefix e-; gh = /f/	cipher	/ˈsaɪfər/	Arabic sifr (empty, zero); medial ph = /f/
phlox	/flɑːks/	Greek phlox (flame); initial ph = /f/	orphan	/ˈɔːrfən/	Greek orphanos (parentless); medial ph = /f/
Phœbe	/ˈfiːbi/	Proper noun; Greek Phoibe (radiant); ligature œ	sulphur	/ˈsʌlfər/	Latin sulfur / Greek transcription; medial ph = /f/
camphor	/ˈkæmfər/	Sanskrit karpura via Arabic/Greek; medial ph = /f/	bow (recap)	/baʊ/	In Sangster poem: "Till the Old Year made his bow"

Section 3: Master Oral Dictation Script, Socratic Inquiry & Evaluative Rubric

Dictation • Socratic • 20-Point Rubric

Oral Dictation Sentences:

“Philip took a clear photograph of the garden phlox.”
“A merry child can laugh even when the road is rough.”
“The kind lady adopted a lonely orphan and his nephew.”
“Phœbe solved the difficult cipher on the blackboard.”
“We had enough warm wood to cure the bad winter cough.”

Socratic Inquiry Key:

Q: “Why do words like tough and rough end in gh when they sound like f?”
A: “Because in Old English, gh was sounded like a throat scraping sound (/x/). Over centuries, English speakers shifted that sound into /f/, but preserved the ancient gh spelling!”
Q: “Where do words with ph come from?”
A: “Almost all ph words come from the Greek language (like phlox, phrase, photograph).”

Scoring Rubric (20 Pts):

1. /f/ Sound Orthography (5 pts): Flawless spelling of all 15 target words with <gh> and <ph>.
2. Etymological Discrimination (5 pts): Accurate classification of Germanic <gh> vs. Greek <ph>.
3. Penmanship (5 pts): Strict 26px line discipline; ascenders and descenders touching midline.
4. Sentence Mechanics (5 pts): Original sentence composition; proper capitalization of Philip and Phœbe.

Mastery: 18–20 | Proficient: 15–17 | Developing: 12–14 | Emerging: <12