11.2 Case Study 1: Foundational Reading Skills Analysis

11.2 Case Study 1: Foundational Reading Skills Analysis

Objective Focus: FoRT Objective 0010 requires candidates to analyze diagnostic assessment data for an individual student, identify one significant foundational reading strength and one significant foundational reading need, and design an explicit instructional intervention supported by a scientific rationale.

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Practice Prompt & Student Context

Student Background: Marcus is a second-grade student who transitioned to the district at the beginning of the school year. His classroom teacher administered an Informal Reading Inventory (IRI) running record and a diagnostic phonics and spelling screener to evaluate his foundational word identification skills.

Assignment Tasks: Write a response in which you:

1. Identify one significant strength Marcus demonstrates in foundational reading skills, citing specific evidence from the exhibits.
2. Identify one significant need Marcus demonstrates in foundational reading skills, citing specific evidence from the exhibits.
3. Describe an explicit, evidence-based instructional strategy to address Marcus's identified need.
4. Explain the rationale for this instructional strategy, detailing why it is effective in developing foundational reading skills.

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Student Assessment Artifacts

Exhibit 1: Informal Reading Inventory (IRI) Running Record

• Text: A Day at the Lake (Level: Early Grade 2 / 100 words total)
• Performance Summary: Total Words Read: 100 | Oral Reading Accuracy: 89% (Frustrational Level) | Total Errors: 11 | Self-Corrections: 1

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Exhibit 2: Diagnostic Phonics & Spelling Inventory Data

• Assessment Tool: CORE Phonics Screener & Words Their Way Qualitative Spelling Inventory

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Diagnostic Analysis: Identifying Strength vs. Need

┌────────────────────────────────────────────────────────────────────────┐
│                     DIAGNOSTIC EVIDENCE SYNTHESIS                      │
├───────────────────────────────────┬────────────────────────────────────┤
│  STRENGTH: Closed Syllables &     │  NEED: Vowel Digraphs (Teams)      │
│  Consonant Blends / Digraphs      │  & Long Vowel Patterns             │
│  • 100% on CVC decoding/spelling  │  • 0% on Vowel Digraph subtests    │
│  • Mastered initial & final blends│  • Overgeneralizes closed-syllable │
│  • Accurately reads: black, rod,  │    short vowel phonemes            │
│    past, mast, frog, rock, swim   │  • Miscues: boat→bot, feet→fet,    │
│  • Demonstrates alphabetic        │    leap→lep, bait→bat, keep→kep    │
│    principle for 1-to-1 matching  │  • Spelling: TRAN, FLOT, SWET      │
└───────────────────────────────────┴────────────────────────────────────┘

Step 1: Pinpoint the Reading Strength

• Finding: Marcus has established strong letter-sound correspondences for single consonants, consonant digraphs (sh, ch, ck), and complex consonant blends (bl-, fr-, sw-, -st, -mp). He automatically applies the closed-syllable rule to decode short vowels in CVC and CCVC/CVCC words.
• Exhibit Citations: Accurately reads black, rod, past, mast, frog, rock, swim (Exhibit 1) and scores 5/5 on Short Vowels and 5/5 on Consonant Blends (Exhibit 2).

Step 2: Pinpoint the Reading Need

• Finding: Marcus lacks orthographic knowledge of vowel digraphs (vowel teams). When encountering words with two vowel letters (e.g., oa, ai, ee, ea), he ignores the second vowel grapheme and default-pronounces the first vowel as a short vowel sound.
• Exhibit Citations: Miscoded boat as bot, leap as lep, feet as fet, bait as bat, keep as kep, main as man (Exhibit 1), and spelled train as TRAN, float as FLOT, and sweet as SWET (Exhibit 2).

Step 3: Select the Explicit Intervention

• Strategy: Explicit, multi-sensory Phoneme-Grapheme Mapping using Elkonin Sound Boxes and Magnetic Letter Tiles, paired with Closed vs. Vowel Team Word Sorts and Decodable Text Application.

Step 4: Formulate the Science of Reading Rationale

• Theory: Linnea Ehri's and David Kilpatrick's Orthographic Mapping theory; explicit instruction prevents cognitive guessing and builds permanent neural connections in the visual word form area.

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Annotated Score-4 Exemplar Response

Below is a complete, unedited model response illustrating the exact structure, academic tone, exhibit citations, and pedagogical rationale required to achieve a Score Point 4.

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                        SCORE-4 MODEL OPEN-RESPONSE ESSAY
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[PARAGRAPH 1: SIGNIFICANT STRENGTH]
Based on the provided assessment data, Marcus demonstrates a significant foundational 
reading strength in decoding and encoding single-syllable closed words containing short 
vowels, consonant digraphs, and initial and final consonant blends. In Exhibit 1 
(Running Record), Marcus accurately read words with initial blends such as "black" 
(Line 2), "frog" (Line 6), and "swim" (Line 8), as well as words with final consonant 
clusters including "past" and "mast" (Line 5). Furthermore, in Exhibit 2 (Phonics and 
Spelling Screener), Marcus achieved 100% mastery (5/5) on the Short Vowels in CVC Words 
subtest and 100% (5/5) on Consonant Blends and Digraphs, correctly spelling words such 
as "GLAD", "DROP", and "HUNT". These data indicate that Marcus has mastered the 
alphabetic principle for single-letter graphemes and consonant clusters, demonstrating 
intact phonemic segmentation and automaticity in closed-syllable phonics patterns.

[PARAGRAPH 2: SIGNIFICANT NEED]
Conversely, Marcus demonstrates a significant foundational reading need in decoding and 
encoding words containing vowel digraphs (vowel teams, such as 'oa', 'ai', 'ee', and 
'ea'). In Exhibit 1, Marcus consistently overgeneralized the closed-syllable rule by 
substituting short vowel sounds for long vowel teams, misreading "boat" as "bot" [bŏt] 
(Line 3), "main" as "man" [măn] (Line 4), "leap" as "lep" [lĕp] (Line 6), "feet" as 
"fet" [fĕt] (Line 7), and "bait" as "bat" [băt] (Line 9). This diagnostic pattern is 
corroborated in Exhibit 2, where Marcus scored 0/5 on the Vowel Digraph reading subtest 
and 0/4 on vowel digraph spelling, producing orthographic representations such as "TRAN" 
for train, "FLOT" for float, and "SWET" for sweet. Marcus's errors demonstrate that he 
lacks the orthographic knowledge that two adjacent vowel letters can represent a single 
long vowel phoneme, causing him to truncate his phonemic segmentation and omit the 
second vowel grapheme.

[PARAGRAPH 3: TARGETED INSTRUCTIONAL INTERVENTION]
To remediate this deficit, the teacher should implement an explicit, multi-sensory 
Structured Literacy intervention focused on vowel team phoneme-grapheme mapping using 
Elkonin sound boxes and magnetic letter tiles. First, during direct modeling ('I Do'), 
the teacher explicitly introduces one vowel team pattern at a time (e.g., 'oa' representing 
/ō/), articulates the long /ō/ sound, and models placing a single 'oa' tile into the middle 
box of a 3-box Elkonin grid for the word "boat" (/b/ - /oa/ - /t/), explicitly stating that 
these two letters work together to represent one sound. Next, during guided practice 
('We Do'), the teacher provides Marcus with sound boxes and letter tiles to construct 
and segment target words (e.g., 'coat', 'foam', 'road'). The teacher prompts Marcus to tap 
each phoneme, push the corresponding grapheme tiles into the boxes, and blend the word 
aloud, providing immediate corrective feedback if he attempts to split the vowel team. 
Marcus then completes an orthographic open/closed word sort contrasting CVC words with 
vowel teams (e.g., "got" vs. "goat", "rod" vs. "road"). Finally, during independent 
application ('You Do'), Marcus reads a decodable text controlled for 'oa' words and writes 
target words from teacher dictation to reinforce encoding.

[PARAGRAPH 4: SCIENCE OF READING RATIONALE]
This instructional intervention is highly effective because it directly targets the 
cognitive mechanism of orthographic mapping (Ehri, 2014; Kilpatrick, 2015). By utilizing 
Elkonin sound boxes and grapheme tiles, the multi-sensory routine makes the abstract 
concept of vowel digraphs visually and kinesthetically concrete, forcing the student's 
working memory to bind the two-letter grapheme sequence directly to the single spoken 
phoneme. Furthermore, contrasting CVC words with vowel team counterparts in word sorts 
remediates Marcus's overreliance on closed-syllable rules by drawing explicit visual 
attention to internal orthographic structures. Finally, applying the newly taught pattern 
immediately in controlled decodable text bridges isolated decoding to connected reading, 
building lexical automaticity and freeing cognitive capacity for reading comprehension.
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Rubric-by-Rubric Scoring Analysis