LETRS Unit 5 Final Assessment Exam
Latest Update
Questions & Correct Answers (100% Correct Verified Answers)
The Mighty Word: Oral Language and Vocabulary
Aligned with 2026-2027 LETRS Unit 5 Curriculum | Sessions 1-6
50 Questions | Multiple Choice | A+ Verified Answers
Domain 1: Early Language Development and Vocabulary Foundations
Q1: According to the research conducted by Hart and Risley (1995), which of the following best describes
the significance of the number of words to which preschoolers are exposed?
A. The number of words heard by preschoolers has no measurable impact on later academic achievement
B. The number of words to which preschoolers are exposed predicts their vocabulary knowledge at grade
three **[CORRECT]**
C. Preschoolers who hear fewer words catch up naturally by third grade regardless of intervention
D. The number of words heard only affects spoken language development, not reading comprehension
Correct Answer: B
Rationale: Hart and Risley (1995) demonstrated that the number of words to which preschoolers are exposed directly predicts their
vocabulary knowledge at grade three. Their landmark research established the well-known 30-million-word gap between children
from high- and low-language family environments. The predictive relationship between early language exposure and later
vocabulary is a foundational principle in the Science of Reading and LETRS Unit 5.
Q2: What does the term "30-million-word gap" refer to in the context of early language development
research?
A. The difference in vocabulary size between students who read fiction versus nonfiction by third grade
B. The difference in the number of words heard by preschool children raised in high- and low-language
family environments **[CORRECT]**
C. The gap between the number of words students can decode versus the number they can comprehend
D. The difference in the number of words taught explicitly in schools versus learned incidentally
Correct Answer: B
Rationale: The 30-million-word gap refers to the dramatic difference in the number of words heard by preschool children raised in
high- versus low-language family environments, as documented by Hart and Risley (1995). This research finding is central to
LETRS Unit 5 because it underscores the critical importance of early language stimulation and the need for intentional, rich
language interactions in the preschool years to close this gap for children from less language-rich homes.
LETRS Unit 5 Final Assessment Exam 2026/2027 - Questions & Correct Answers Page 1
, Q3: A kindergarten teacher wants to foster early language development in her students. Which approach
is MOST effective according to LETRS Unit 5 principles?
A. Providing each student with a tablet loaded with educational vocabulary games for 45 minutes daily
B. Playing children's television programs for several hours daily to maximize vocabulary exposure
C. Encouraging parents and caregivers to increase conversational exchanges with children and talk about
a range of topics **[CORRECT]**
D. Using flashcards with simple words and having students memorize definitions during circle time
Correct Answer: C
Rationale: LETRS Unit 5 emphasizes that encouraging parents and caregivers to increase conversational exchanges with children
and talk about a range of topics is the most effective approach for fostering early language development. Limiting interactions to
directive or instructional language, providing electronic devices, or relying on television programs are all less effective strategies.
Rich, interactive, responsive conversations build the foundational vocabulary knowledge that predicts later reading success.
Q4: A preschool teacher notices that one of her students, Marcus, comes from a home where caregivers
primarily use directive and instructional language rather than conversational exchanges. What is the most
likely implication for Marcus based on LETRS Unit 5 content?
A. Marcus will likely develop stronger listening comprehension due to the structured language environment
B. Marcus may have a smaller vocabulary at school entry compared to peers from more conversation-rich
homes **[CORRECT]**
C. Marcus will likely excel at decoding words because of the emphasis on direct instruction
D. Marcus will show no differences in language development because all children learn at the same rate
Correct Answer: B
Rationale: According to LETRS Unit 5 and Hart and Risley research, children from homes where language interactions are limited
primarily to directive or instructional language tend to have smaller vocabularies at school entry compared to peers from homes
with richer conversational exchanges. This is because conversational interactions expose children to a wider variety of words and
grammatical structures, building the semantic knowledge foundation that supports later reading comprehension.
Q5: Which of the following statements about the relationship between preschool vocabulary and later
reading comprehension is MOST accurate according to LETRS Unit 5?
A. Preschool vocabulary predicts decoding ability but not reading comprehension in later grades
B. A developed vocabulary in preschoolers predicts better reading comprehension in third grade
**[CORRECT]**
C. Preschool vocabulary has no measurable relationship to reading comprehension outcomes
D. Preschool vocabulary only predicts reading comprehension if the child attends a high-quality preschool
program
Correct Answer: B
Rationale: LETRS Unit 5 explicitly states that a developed vocabulary in preschoolers predicts better reading comprehension in
third grade. This predictive relationship is one of the most robust findings in reading research and is foundational to the Science of
Reading framework. Vocabulary knowledge established in the preschool years creates a foundation that supports comprehension as
children learn to read connected text independently.
Q6: According to LETRS Unit 5, approximately how many new words must students learn each year to
meet grade-level expectations?
A. About 100 new words per year across all grade levels
B. About 500 new words per year in the primary grades
LETRS Unit 5 Final Assessment Exam 2026/2027 - Questions & Correct Answers Page 2
, C. Several thousand new words every year **[CORRECT]**
D. About 1,000 new words per year through middle school, then fewer in high school
Correct Answer: C
Rationale: LETRS Unit 5 emphasizes that students must learn the meanings of several thousand new words every year to meet
grade-level expectations. This staggering number highlights why both explicit instruction and incidental learning opportunities are
essential. It also underscores why word selection for explicit teaching must be strategic and purposeful, focusing on high-utility
words that will have the greatest impact on comprehension across content areas.
Q7: A second-grade teacher is planning vocabulary instruction for the week. According to LETRS Unit 5,
approximately how many words should be taught in depth per week in the primary grades?
A. About 3 words per week
B. About 10 words per week **[CORRECT]**
C. About 25 words per week
D. About 50 words per week
Correct Answer: B
Rationale: LETRS Unit 5 specifies that about 10 words should be taught in depth per week in the primary grades. This number
reflects the need for deep, lasting word learning rather than superficial exposure. Teaching fewer words in greater depth, with
multiple exposures and opportunities for use, is more effective than briefly exposing students to a larger number of words they are
unlikely to retain or understand fully.
Q8: Which of the following is the LEAST effective way to foster implicit learning of vocabulary in young
children, according to LETRS Unit 5?
A. Reading aloud high-quality children's literature and discussing the story
B. Engaging children in extended conversations about topics of interest
C. Providing several hours daily of children's television programs **[CORRECT]**
D. Encouraging pretend play with peers that involves role-taking and narration
Correct Answer: C
Rationale: LETRS Unit 5 identifies providing several hours daily of children's television programs as the least effective way to foster
implicit learning of vocabulary. While television can expose children to some language, it lacks the interactive, responsive, and
contextualized nature of live conversation and shared book reading that builds deep vocabulary knowledge. Interactive language
experiences provide far richer and more durable vocabulary growth than passive screen exposure.
Q9: A first-grade teacher wants to support language development for a student who has limited exposure
to rich language at home. Which strategy would be MOST beneficial based on Hart and Risley research
findings?
A. Assigning the student additional worksheets to complete independently
B. Increasing the quantity and quality of conversational exchanges with the student during the school day
**[CORRECT]**
C. Recommending that the parent purchase educational software for home use
D. Placing the student in a reading intervention group focused solely on phonics
Correct Answer: B
Rationale: Based on Hart and Risley research, increasing the quantity and quality of conversational exchanges with the student
during the school day is the most beneficial strategy. The research demonstrates that the sheer number and richness of
conversational interactions predict vocabulary growth. Worksheets, educational software, and phonics-only interventions, while
potentially valuable in other contexts, do not directly address the language exposure gap that is central to vocabulary development.
LETRS Unit 5 Final Assessment Exam 2026/2027 - Questions & Correct Answers Page 3
Latest Update
Questions & Correct Answers (100% Correct Verified Answers)
The Mighty Word: Oral Language and Vocabulary
Aligned with 2026-2027 LETRS Unit 5 Curriculum | Sessions 1-6
50 Questions | Multiple Choice | A+ Verified Answers
Domain 1: Early Language Development and Vocabulary Foundations
Q1: According to the research conducted by Hart and Risley (1995), which of the following best describes
the significance of the number of words to which preschoolers are exposed?
A. The number of words heard by preschoolers has no measurable impact on later academic achievement
B. The number of words to which preschoolers are exposed predicts their vocabulary knowledge at grade
three **[CORRECT]**
C. Preschoolers who hear fewer words catch up naturally by third grade regardless of intervention
D. The number of words heard only affects spoken language development, not reading comprehension
Correct Answer: B
Rationale: Hart and Risley (1995) demonstrated that the number of words to which preschoolers are exposed directly predicts their
vocabulary knowledge at grade three. Their landmark research established the well-known 30-million-word gap between children
from high- and low-language family environments. The predictive relationship between early language exposure and later
vocabulary is a foundational principle in the Science of Reading and LETRS Unit 5.
Q2: What does the term "30-million-word gap" refer to in the context of early language development
research?
A. The difference in vocabulary size between students who read fiction versus nonfiction by third grade
B. The difference in the number of words heard by preschool children raised in high- and low-language
family environments **[CORRECT]**
C. The gap between the number of words students can decode versus the number they can comprehend
D. The difference in the number of words taught explicitly in schools versus learned incidentally
Correct Answer: B
Rationale: The 30-million-word gap refers to the dramatic difference in the number of words heard by preschool children raised in
high- versus low-language family environments, as documented by Hart and Risley (1995). This research finding is central to
LETRS Unit 5 because it underscores the critical importance of early language stimulation and the need for intentional, rich
language interactions in the preschool years to close this gap for children from less language-rich homes.
LETRS Unit 5 Final Assessment Exam 2026/2027 - Questions & Correct Answers Page 1
, Q3: A kindergarten teacher wants to foster early language development in her students. Which approach
is MOST effective according to LETRS Unit 5 principles?
A. Providing each student with a tablet loaded with educational vocabulary games for 45 minutes daily
B. Playing children's television programs for several hours daily to maximize vocabulary exposure
C. Encouraging parents and caregivers to increase conversational exchanges with children and talk about
a range of topics **[CORRECT]**
D. Using flashcards with simple words and having students memorize definitions during circle time
Correct Answer: C
Rationale: LETRS Unit 5 emphasizes that encouraging parents and caregivers to increase conversational exchanges with children
and talk about a range of topics is the most effective approach for fostering early language development. Limiting interactions to
directive or instructional language, providing electronic devices, or relying on television programs are all less effective strategies.
Rich, interactive, responsive conversations build the foundational vocabulary knowledge that predicts later reading success.
Q4: A preschool teacher notices that one of her students, Marcus, comes from a home where caregivers
primarily use directive and instructional language rather than conversational exchanges. What is the most
likely implication for Marcus based on LETRS Unit 5 content?
A. Marcus will likely develop stronger listening comprehension due to the structured language environment
B. Marcus may have a smaller vocabulary at school entry compared to peers from more conversation-rich
homes **[CORRECT]**
C. Marcus will likely excel at decoding words because of the emphasis on direct instruction
D. Marcus will show no differences in language development because all children learn at the same rate
Correct Answer: B
Rationale: According to LETRS Unit 5 and Hart and Risley research, children from homes where language interactions are limited
primarily to directive or instructional language tend to have smaller vocabularies at school entry compared to peers from homes
with richer conversational exchanges. This is because conversational interactions expose children to a wider variety of words and
grammatical structures, building the semantic knowledge foundation that supports later reading comprehension.
Q5: Which of the following statements about the relationship between preschool vocabulary and later
reading comprehension is MOST accurate according to LETRS Unit 5?
A. Preschool vocabulary predicts decoding ability but not reading comprehension in later grades
B. A developed vocabulary in preschoolers predicts better reading comprehension in third grade
**[CORRECT]**
C. Preschool vocabulary has no measurable relationship to reading comprehension outcomes
D. Preschool vocabulary only predicts reading comprehension if the child attends a high-quality preschool
program
Correct Answer: B
Rationale: LETRS Unit 5 explicitly states that a developed vocabulary in preschoolers predicts better reading comprehension in
third grade. This predictive relationship is one of the most robust findings in reading research and is foundational to the Science of
Reading framework. Vocabulary knowledge established in the preschool years creates a foundation that supports comprehension as
children learn to read connected text independently.
Q6: According to LETRS Unit 5, approximately how many new words must students learn each year to
meet grade-level expectations?
A. About 100 new words per year across all grade levels
B. About 500 new words per year in the primary grades
LETRS Unit 5 Final Assessment Exam 2026/2027 - Questions & Correct Answers Page 2
, C. Several thousand new words every year **[CORRECT]**
D. About 1,000 new words per year through middle school, then fewer in high school
Correct Answer: C
Rationale: LETRS Unit 5 emphasizes that students must learn the meanings of several thousand new words every year to meet
grade-level expectations. This staggering number highlights why both explicit instruction and incidental learning opportunities are
essential. It also underscores why word selection for explicit teaching must be strategic and purposeful, focusing on high-utility
words that will have the greatest impact on comprehension across content areas.
Q7: A second-grade teacher is planning vocabulary instruction for the week. According to LETRS Unit 5,
approximately how many words should be taught in depth per week in the primary grades?
A. About 3 words per week
B. About 10 words per week **[CORRECT]**
C. About 25 words per week
D. About 50 words per week
Correct Answer: B
Rationale: LETRS Unit 5 specifies that about 10 words should be taught in depth per week in the primary grades. This number
reflects the need for deep, lasting word learning rather than superficial exposure. Teaching fewer words in greater depth, with
multiple exposures and opportunities for use, is more effective than briefly exposing students to a larger number of words they are
unlikely to retain or understand fully.
Q8: Which of the following is the LEAST effective way to foster implicit learning of vocabulary in young
children, according to LETRS Unit 5?
A. Reading aloud high-quality children's literature and discussing the story
B. Engaging children in extended conversations about topics of interest
C. Providing several hours daily of children's television programs **[CORRECT]**
D. Encouraging pretend play with peers that involves role-taking and narration
Correct Answer: C
Rationale: LETRS Unit 5 identifies providing several hours daily of children's television programs as the least effective way to foster
implicit learning of vocabulary. While television can expose children to some language, it lacks the interactive, responsive, and
contextualized nature of live conversation and shared book reading that builds deep vocabulary knowledge. Interactive language
experiences provide far richer and more durable vocabulary growth than passive screen exposure.
Q9: A first-grade teacher wants to support language development for a student who has limited exposure
to rich language at home. Which strategy would be MOST beneficial based on Hart and Risley research
findings?
A. Assigning the student additional worksheets to complete independently
B. Increasing the quantity and quality of conversational exchanges with the student during the school day
**[CORRECT]**
C. Recommending that the parent purchase educational software for home use
D. Placing the student in a reading intervention group focused solely on phonics
Correct Answer: B
Rationale: Based on Hart and Risley research, increasing the quantity and quality of conversational exchanges with the student
during the school day is the most beneficial strategy. The research demonstrates that the sheer number and richness of
conversational interactions predict vocabulary growth. Worksheets, educational software, and phonics-only interventions, while
potentially valuable in other contexts, do not directly address the language exposure gap that is central to vocabulary development.
LETRS Unit 5 Final Assessment Exam 2026/2027 - Questions & Correct Answers Page 3
