Source Sleuths Teacher Guide Library Media Center • 4th Grade Research Unit
Lesson 1 of 1
Source Sleuths: Inquiry & Evidence
Instructional plan for guiding students to craft thick inquiry questions, target search terms, and extract verified notes.
Estimated Time 45–50 Minutes
Target Grade Grade 4 (Ages 9–10)
Grouping Whole Class / Pairs
Setting Library & Nonfiction Stacks
Curricular Standards
AASL Inquire I.A.1: Formulate questions about a topic for inquiry.AASL Inquire I.B.1: Select and evaluate relevant sources.CCSS.ELA-LITERACY.W.4.7: Conduct short research projects that build knowledge through investigation.CCSS.ELA-LITERACY.W.4.8: Recall or gather information from print and digital sources; take notes and categorize info.
Essential Questions
• How does changing a single word turn a simple "one-fact" question into a deep inquiry investigation?
• What clues prove whether a book or digital article is reliable, accurate, and relevant?
• How can we capture big ideas in our own words without falling into the "copycat trap"?
Materials & Environment Setup
Print Handouts 1x Source Sleuths Dossier per student, 1x half-sheet Exit Ticket per student, pencils.
Media & Tech Projector/Screen loaded with Source Sleuths Slide Deck ; student devices optional for online database test.
Library Stations Pre-staged nonfiction book carts by Dewey categories (Animals 590s, History 900s, Technology 600s).
Instructional Sequence & Time Allocation Total: 45 Minutes
Time Stage Key Teacher Actions Student Tasks 00–07m Hook & Inquiry Spark Present the "Thin vs. Thick Mystery". Model the difference between quick lookup facts and investigative questions. Choral response; sort sample questions on slide using thumbs up/down. 07–18m Explicit Mini-Lesson Teach the 3-C Source Check (Clues, Credibility, Current) & demonstrate stripping "stop words" to make strong keywords. Turn-and-talk keyword brainstorm; inspect sample book spine, index, and copyright. 18–35m Active Sleuthing Lab Facilitate station movement. Confer with pairs on call numbers, book index navigation, and paraphrasing without copying. Choose topic; craft 1 thick question; locate 2 valid sources; complete Missions 1–4 in Dossier. 35–42m Synthesis & Case Report Guide synthesis: combine two source findings into a cohesive 3-sentence summary in student's own voice. Write final dossier finding; complete self-check badge rubric. 42–45m Checkout & Exit Ticket Collect Exit Tickets as the "Library Pass" before open book checkout and shelf browsing. Hand in exit slip; select independent reading book.
Elementary Library Information Literacy Curriculum • 4th Grade Page 1 of 2
Teacher Facilitation Script & Differentiation Source Sleuths
Instructional Modeling & Classroom Strategies
Mini-Lesson Think-Aloud: Thick vs. Thin Questions Slide 2 Modeling
“Detectives, if I ask, ‘How many legs does an octopus have?’ that’s a thin question . You answer it in three seconds with one number: eight. Case closed. But what if I ask, ‘How does an octopus use camouflage and problem-solving to survive predators in the deep ocean?’ That is a thick question ! You can’t answer it with one word. You have to hunt down multiple facts, compare sources, and think like a scientist.”
Keyword Demonstration: The Fluff-Stripper Strategy Slide 5 Modeling
“When you type in the library catalog or database search bar, computers do not understand conversational chit-chat. If you type ‘Can you please tell me what kind of foods sea otters like to eat?’ the search engine gets confused by ‘please’, ‘tell’, and ‘like’. We strip the fluff! We keep only the heavyweight keywords: sea otter AND diet OR food . Notice how two words do the work of ten!”
The 3-C Credibility Inspection Slide 4 Routine
1. Clues (Author & Publisher): Who wrote it? Is it an expert, recognized educational publisher (e.g., National Geographic, Scholastic, DK), or an anonymous blogger?2. Current (Date): When was it published? For space, technology, and health, newer matters!3. Content (Facts vs. Sales): Is the author teaching you facts, or trying to sell you a product or push an opinion?
Support / Striving Readers
• Provide curated book tubs with color-coded spine tags for immediate success.
• Offer inquiry sentence stems: “How does [subject] adapt to...?”
• Allow voice-to-text or paired partner note-taking during station work.
Extension / Advanced
• Challenge students to identify one conflicting detail between two different sources.
• Have them locate and cite copyright date and publishing city for MLA preview.
• Introduce search operators (quotation marks “ ” for exact phrases).
English Language Learners
• Leverage visual non-fiction books (DK Eyewitness) with diagram-rich layouts.
• Display bilingual question starters (Why / Por qué, How / Cómo).
• Allow sketch-noting for key findings before converting to English sentences.
Formative Assessment Rubric (Dossier Scoring Guide) 4 Criteria • 1–4 Point Scale
Skill Area Novice Sleuth (1 pt) Skilled Sleuth (2 pts) Master Investigator (3 pts) Inquiry Question Thin question answerable by a single word or number. Thick question, but requires teacher prompting to refine. Deep "How/Why" question driving genuine investigation. Source Selection Source is unverified, fictional, or missing title/call info. One valid library source cited with title & Dewey/author. Two distinct credible sources cited with title, author & location. Note-Taking & Paraphrase Word-for-word copied text from the book. Notes are paraphrased but closely mirror source sentence structure. Original note phrasing capturing key facts without copying.
Source Sleuths • Instructional Reference Guide Page 2 of 2
Source Sleuths Slide Deck Library Research Skills • Grade 4
Media Center Quest
Top Secret Inquiry Briefing
SOURCE SLEUTHS
Crack the code of great research: Ask thick questions, evaluate sources, and gather facts like a detective.
1. Craft Thick Questions
2. Apply the 3-C Test
3. Record Original Notes
Step 1: Inquiry Questioning
Thin Questions vs. Thick Questions
Thin Questions
Answered in one word or number. Closes the door on thinking quickly.
Example:
“How many moons does Jupiter have?”
→ Answer: “95.” (Investigation is over!)
Thick Questions
Requires explanation, comparisons, and multiple facts. Opens the door!
Example:
“How does Jupiter’s gravity protect Earth from asteroids?”
→ Requires deep reading and evidence!
Sleuth Secret: Start your question with “How” or “Why” instead of “What year” or “How many.”
Step 2: Source Evaluation
The 3-C Credibility Inspection
1. Clues
Who wrote it?
Look for expert authors, trusted publishers, universities, or official library databases.
2. Current
When was it made?
Check the copyright date. Science, planets, and technology change fast! Older books may have outdated facts.
3. Content
Fact or Opinion?
Is the source trying to teach real facts, or trying to sell you something or change your opinion?
Rule of Thumb: If a source fails even one “C”, cross-check it with another library book!
Step 3: Catalog & Index Search
Keyword Power: Strip the Fluff
Don’t type a conversational sentence:
“Can you tell me what kind of food do sea otters like to eat in the ocean?”
Do extract heavyweight keywords:
sea otter + diet OR prey
Pro Sleuth Tip: Look in the Book Index at the back of the book for your exact keywords!
Step 4: Evidence Gathering
Escape the “Copycat Trap”
The Copycat Trap
Copying exact sentences directly from the book without putting them in your own words.
“Sea otters possess dense fur containing one million hairs per square inch.”
→ Copying word-for-word is plagiarism!
The Sleuth Summary
Read the fact, look away from the page, and write what you understood in your own voice!
Source Sleuths Research Dossier OFFICIAL SOURCE SLEUTH DOSSIER
Elementary Library Media Center • Research Case File #4
Classroom Investigation
Detective Name
Investigation Date
Homeroom / Teacher
Mission 1: The Question Upgrade Upgrade from a simple fact to deep inquiry
Investigation Topic: (Examples: Ocean Animals, Volcanoes, Space Exploration, Early Inventions)
Thin Question (1-Word / Quick Fact Answer):
Upgraded Thick Question (Starts with How or Why):
Mission 2: Keyword Power Grid (Strip the Fluff) Pick 3 words to search in the catalog or book index
Do not type full questions! Choose the 3 most important nouns, topics, or scientific terms:
Keyword #1
Keyword #2
Keyword #3 (Alternate / Synonym)
Mission 3: Source Inspection Log (2 Credible Sources) Inspect before you read
Source A: Nonfiction Library Book From the library stacks
Book Title:
Author:
Dewey Call #:
3-C Check: Clues (Expert Author) Current (Copyright Year: _____) Content (Real facts)
Source B: Reference Book or School Database Encyclopedia / Online resource
Article / Book Title:
Database Name or Publisher (e.g., PebbleGo, World Book, DK):
3-C Check: Clues (Trusted Publisher) Current (Up-to-date) Content (Real facts)
Turn page over to record evidence in Mission 4 & 5 Page 1 of 2
CASE EVIDENCE & SYNTHESIS REPORT
Detective Case File Continued
Mission 4: The Evidence Locker (Original Notes) Avoid the Copycat Trap!
Read your source, look away, and write each fact in your own words .
Evidence Clue #1 (From Source A • Page Number: _____) Fact about your topic
Evidence Clue #2 (From Source B • Section / Page: _____) Fact about your topic
Evidence Clue #3 (Bonus Discovery from either source) Surprising or supporting detail
Mission 5: Final Case Synthesis (Case Summary) Put the clues together
Write a 2–3 sentence paragraph answering your Thick Inquiry Question using your evidence:
Investigator Self-Assessment Checklist Check each box before closing your case!
My question is thick and cannot be answered with one simple word.
I evaluated both sources with the 3-C Test (Clues, Current, Content).
I avoided the Copycat Trap and wrote notes in my own words.
Source Sleuths Exit Ticket Source Sleuths • Checkout Pass
4th Grade Library Research Skills • Exit Assessment
Exit Ticket
Student Name:
Date:
Homeroom Teacher:
1. Thick or Thin? Mark your choice for each question:
A) “What year did Apollo 11 land on the Moon?”
Thin Thick
B) “How did engineers design space suits to survive extreme heat?”
Thin Thick
2. Keyword Stripper: Strip the conversational fluff from this search:
“Can you show me what kinds of food giant pandas eat in the wild?”
Keyword #1:
Keyword #2:
3. The 3-C Test: Why does this source fail?
Leo finds an undated personal web page with no author name claiming sharks are robots. Which “C” is missing and why?
Hand in to your librarian for open book checkout privileges Librarian Initials: [ _____ ]
CUT HERE • TWO TICKETS PER PAGE
Source Sleuths • Checkout Pass
4th Grade Library Research Skills • Exit Assessment
Exit Ticket
Student Name:
Date:
Homeroom Teacher:
1. Thick or Thin? Mark your choice for each question:
A) “What year did Apollo 11 land on the Moon?”
Thin Thick
B) “How did engineers design space suits to survive extreme heat?”
Thin Thick
2. Keyword Stripper: Strip the conversational fluff from this search:
“Can you show me what kinds of food giant pandas eat in the wild?”
Keyword #1:
Keyword #2:
3. The 3-C Test: Why does this source fail?
Leo finds an undated personal web page with no author name claiming sharks are robots. Which “C” is missing and why?
Hand in to your librarian for open book checkout privileges Librarian Initials: [ _____ ]
