Lesson 15: Short and Long I (pin vs. pine)

1. Complete 16-Word Phonetic & Orthographic Matrix

Col 1 • Short ĭ (/ɪ/)

thin /θɪn/

thĭn

skin /skɪn/

skĭn

trim /trɪm/

trĭm

swim /swɪm/

swĭm

Col 2 • Long ī (/aɪ/)

fine /faɪn/

fīne

line /laɪn/

līne

time /taɪm/

tīme

dime /daɪm/

dīme

Col 3 • Short ĭ (-ll)

ill /ɪl/

ĭll

hill /hɪl/

hĭll

will /wɪl/

wĭll

still /stɪl/

stĭll

Col 4 • Long ī (/aɪ/)

find /faɪnd/

fīnd

mind /maɪnd/

mīnd

kind /kaɪnd/

kīnd

vine /vaɪn/

vīne

2. Master Answers to Textbook Discovery Questions

Question 1: Give the sound which i has in the words in the first column.
→ Official Answer: The short sound of i, marked with a breve: ĭ (Phonetic IPA: /ɪ/).
Pedagogical Focus: In closed syllables where a single vowel is followed by one or more consonants, the vowel represents its short lax sound.

Question 2: Give the sound which i has in the words in the second column.
→ Official Answer: The long sound of i, marked with a macron: ī (Phonetic IPA: /aɪ/).
Pedagogical Focus: Contrast between CVC (pin, thin) and VCe (fine, line). The long vowel says its letter name.

Question 3: What sound has i in the words which end with silent e?
→ Official Answer: The long sound of i (marked ī, /aɪ/).
Orthographic Rule: Final silent e functions as a diacritic marker that reaches back across a single consonant to signal that the preceding vowel is long.

3. Science of Reading: Orthographic Mapping & Structural Rules

The VCe Syllable Generalization

Final silent e is an orthographic marker rather than an acoustic phoneme. In words like fine, line, time, dime, and vine, the silent e creates a split digraph (i_e) signalling the tense diphthong /aɪ/.

Closed Syllable Exceptions (Wild -nd)

In Anglo-Saxon words ending in homorganic nasal clusters (-nd), short vowels underwent historical vowel lengthening. Hence, find, mind, and kind contain long /aɪ/ despite being closed.

4. Assessment Rubric (25 Points Total)

Task Focus	Instructional Standard & Criteria	Scoring
1. Copying Accuracy	Neat, baseline-aligned transcription of all 16 target words without omissions or reversals.	8 pts (0.5 pt / word)
2. Oral Articulation	Accurate oral spelling and phonological differentiation between short /ɪ/ and long /aɪ/.	4 pts (1 pt / column)
3. Dictation Precision	Flawless spelling under teacher dictation, applying FLOSS (-ll) and VCe (-e) rules correctly.	8 pts (0.5 pt / word)
4. Discovery Questions	Accurate identification of short sound (ĭ) and long sound (ī) in response to questions 1–3.	5 pts (Q1: 1.5, Q2: 1.5, Q3: 2)