2.2 First and Second Language Acquisition and ELD Instruction

2.2 First and Second Language Acquisition and ELD Instruction

CSET Focus: California classrooms represent exceptional linguistic diversity. The CSET Multiple Subjects examination expects educators to understand how children acquire their first language (L1), how second language acquisition (L2) mirrors and diverges from L1, and how to implement the California English Language Development (ELD) Standards using research-grounded pedagogical scaffolding.

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1. Developmental Stages of First Language Acquisition (L1)

All typically developing children across cultures progress through an invariant sequence of language milestones, demonstrating that language acquisition is biologically supported and developmentally constrained:

1. Pre-Linguistic Stage (Birth to ~12 Months)

• Cooing (0–6 Months): Production of open vowel-like sounds ("ooo", "aaa"), expressing comfort, responsiveness, and vocal play.
• Babbling (6–12 Months):
  • Canonical / Reduplicated Babbling (6–9 months): Repeated consonant-vowel combinations ("ba-ba-ba", "ma-ma-ma").
  • Variegated / Non-Reduplicated Babbling (9–12 months): Diverse consonant and vowel combinations with adult-like intonation contours ("ba-da-ma-bu"). Babbling reflects the phonological inventory of the infant's ambient language environment.

2. Holophrastic / One-Word Stage (~12 to 18 Months)

• Children produce single-word utterances (holophrases) that represent complete thoughts, desires, or complex situational meanings. For instance, uttering "Milk!" may signify "I spilled my milk," "I want milk," or "Look, that is a milk carton."
• Lexical Phenomenon:
  • Overextension: Applying a specific word to an overly broad category of items sharing perceptual features (e.g., calling all four-legged animals "doggie").
  • Underextension: Using a general word to refer strictly to a single specific instance (e.g., believing only the family's Golden Retriever is a "dog", while neighbor dogs are not).

3. Telegraphic / Two-Word Stage (~18 to 24 Months)

• Children combine two words to express core semantic relationships (pivot grammar), omitting grammatical function words and bound morphemes (articles, prepositions, auxiliary verbs):
  • Agent + Action: "Doggie bark"
  • Action + Object: "Drink juice"
  • Possessor + Possessed: "Daddy shoe"
  • Attributive: "Big ball"
  • Recurrence: "More cookie"
• Speech resembles telegrams because it relies almost exclusively on high-value content words (nouns and verbs).

4. Multi-Word & Complex Grammar Stage (24+ Months)

• Sentences expand from three-word utterances into complex clause structures with conjunctions and embedded phrases.
• Overregularization / Overgeneralization: Between ages 3 and 5, children apply newly acquired regular grammatical rules to irregular words (e.g., "The cat runned away," "I have two foots," "We saw three deers").
• Linguistic Significance: Overregularization is critical diagnostic proof that children do not acquire language through rote imitation alone; rather, they internalize underlying abstract grammatical rules and apply them generatively.

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2. Major Theoretical Frameworks in Language Acquisition

Detailed Theoretical Perspectives

• Chomsky's Innatist Argument: Chomsky famously highlighted the Poverty of the Stimulus—children are exposed to incomplete, fragmented, and error-filled adult speech, yet effortlessly master complex grammatical structures that were never explicitly taught. This proves the existence of an innate mental module (Language Acquisition Device) programmed with universal grammatical principles.
• Vygotsky's Social Constructivism: Language begins as a social communication tool (social speech), transforms into self-directed problem-solving speech (private speech in toddlers), and eventually internalizes as silent thought (inner speech). Learning occurs within the Zone of Proximal Development (ZPD)—the gap between what a child can achieve independently and what they can achieve with instructional scaffolding.

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3. Stephen Krashen's Theory of Second Language Acquisition

Krashen's SLA model provides the theoretical backbone for modern English Language Development (ELD) instruction. It consists of five interrelated hypotheses:

[Language Input] ──> [Affective Filter (Anxiety/Motivation)] ──> [Language Acquisition Device] ──> [Acquired Competence]
                                                                                                        │
                                                     [Conscious Monitor / Learned Rules] ───────────────┘

1. The Acquisition-Learning Hypothesis:
   • Acquisition is a subconscious, natural process identical to how children acquire L1 through authentic communication. It leads to spontaneous fluency.
   • Learning is the conscious, formal study of grammar rules, verb tables, and explicit syntax. Krashen argues that learning cannot automatically convert into acquisition.
2. The Comprehensible Input Hypothesis ($i+1$):
   • Learners acquire language only when they receive messages they understand that are pitched just one step beyond their current developmental competence ($i+1$).
   • Teachers make input comprehensible using visual realia, gestures, graphic organizers, modeling, and contextual cues without dumbing down academic concepts.
3. The Affective Filter Hypothesis:
   • The Affective Filter is an emotional barrier that can prevent comprehensible input from reaching the language acquisition centers of the brain.
   • High Filter (Barrier Raised): High anxiety, fear of making errors, low self-esteem, hostile classroom environment → language acquisition is blocked.
   • Low Filter (Barrier Lowered): Safe, welcoming classroom, low stress, risk-taking encouraged, high motivation → input penetrates and promotes acquisition.
4. The Natural Order Hypothesis:
   • Grammatical structures are acquired in a predictable, universal order regardless of the order in which they are explicitly taught in a curriculum (e.g., progressive -ing and plural -s are acquired before the third-person singular -s).
5. The Monitor Hypothesis:
   • Consciously learned grammar rules function only as an internal "monitor" or editor that checks and corrects output generated by the acquired system.
   • The monitor operates only when three conditions are met: (a) the speaker has sufficient processing time, (b) the speaker is consciously focused on grammatical form, and (c) the speaker explicitly knows the rule.

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4. California ELD Standards Framework & Proficiency Levels

The California Department of Education organizes English language development along three structured proficiency levels, moving from assisted participation to full academic autonomy:

Integrated ELD vs. Designated ELD in California Schools

California state policy mandates a dual-pronged instructional delivery model for all designated English Learners (ELs):

• Integrated ELD: ELD standards are taught throughout the entire instructional day across all academic disciplines (Math, Science, Social Studies, English Language Arts). Subject-matter teachers embed linguistic scaffolds into core content lessons so ELs access grade-level standards.
• Designated ELD: A protected, dedicated block of daily instructional time where qualified educators teach English language structures directly, calibrated to the students' specific ELD proficiency level (Emerging, Expanding, or Bridging), using the ELD standards as the primary driver.

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5. Cross-Linguistic Transfer and Jim Cummins' Framework

Cummins' Dual-Iceberg Model and Common Underlying Proficiency (CUP)

Professor Jim Cummins established that a student's first language (L1) and second language (L2) do not operate in isolated mental compartments. Instead, they share a Common Underlying Proficiency (CUP):

          [Surface L1 Features]                    [Surface L2 Features]
        (Pronunciation, Orthography)             (Pronunciation, Orthography)
                   \                                  /
                    \                                /
  ===================\==============================/==================== [Water Level]
                      \                            /
                       [   COMMON UNDERLYING       ]
                       [   PROFICIENCY (CUP)       ]
                       [  • Literacy Concepts       ]
                       [  • Metacognitive Skills    ]
                       [  • Academic Reasoning      ]

• Concepts learned in L1 (such as cause-and-effect, reading from left-to-right, mathematical problem-solving, or scientific inquiry) transfer directly to L2 without needing to be re-taught.

BICS vs. CALP

Cummins distinguished between two fundamental registers of language proficiency:

1. BICS (Basic Interpersonal Communicative Skills):
   • Social, conversational, playground fluency.
   • Highly context-embedded (rich in facial expressions, gestures, and immediate situational feedback).
   • Takes 1 to 2 years of immersion to develop.
2. CALP (Cognitive Academic Language Proficiency):
   • Formal, abstract, grade-level academic language required for standardized testing, synthesizing informational texts, and writing research reports.
   • Highly context-reduced (abstract ideas with minimal non-verbal cues).
   • Takes 5 to 7 years (and up to 7–10 years without formal L1 schooling) to develop.

CSET Diagnostic Trap: A student who speaks English fluently and playfully on the school playground with peers (high BICS) may still struggle intensely when reading a 5th-grade science textbook on cellular mitosis (developing CALP). Teachers must not mistake conversational fluency for academic mastery.

Language Transfer Dynamics

• Positive Transfer: Similarities between L1 and L2 accelerate acquisition (e.g., using cognates like organism / organismo, hypothesis / hipótesis, or shared alphabetic print concepts).
• Negative Transfer (Language Interference): Differences between L1 and L2 create syntactic or phonological errors (e.g., a native Spanish speaker saying "The car red" because Spanish places adjectives after nouns [el carro rojo], or struggling to perceive the distinction between English /b/ and /v/).
• Code-Switching: Alternating systematically between two languages or dialects within a single conversation. Code-switching is a sign of high cognitive-linguistic flexibility, not linguistic confusion.