Surgical Script Teacher Guide Surgical Prep Guide
Topic: Prime Factorization & Fraction Reduction
Grade 5
Learning Objective
Students will apply the prime factorization method to reduce "sick" fractions to their lowest terms (healthy state).
Supply List
Fraction Surgery Worksheet
Blue Colored Pencil (Numerators)
Red Colored Pencil (Denominators)
"How to Reduce Fractions" Video
Operation Timeline
05 MIN
Pre-Op Scrub: Multiples Recall
Rapid fire multiplication review focusing on the "Prime Trio": 2, 3, and 5.
10 MIN
Observation Room: Video Analysis
Watch the 15/90 example (1:18 - 2:35). Focus on testing primes sequentially.
20 MIN
Main Operation: Fraction Surgery
Hand out "Sick Patient" cards. Students extract primes until fractions are stable.
05 MIN
Post-Op: Medical Report
Students explain the "cure" for their toughest patient.
Surgical Instructor Notes
The Video Moment
Pause at 1:25. Before she tests 2, ask: "Can 2 go into both?" Discuss the 'divisibility rules' as surgical diagnostic tools (Even numbers for 2, Digit sum for 3, Ending in 0/5 for 5).
Common Surgical Errors
Forgetting a prime: Students might miss that 30 still has a 5 inside it. Remind them to "Check the same prime twice!"Uneven extraction: Remind them that surgery only works if you remove the same factor from top and bottom.
Key Script Prompts
"Scalpel, please! We're looking for a 3 hiding in the numerator."
"Patient is still unstable—there's another 2 lurking in the denominator!"
Surgical Key (Answer Key)
Sick Fraction Extracted Primes Healthy Fraction 12/18 Divide by 2, then by 3 2/3 20/50 Divide by 2, then by 5 (or just 10) 2/5 15/45 Divide by 3, then by 5 1/3 24/60 Divide by 2, 2, and 3 2/5 42/70 Divide by 2, then by 7 3/5
Extension Tip: Poster Surgery
For the "Before and After" poster, encourage students to draw the fractions as "patients." The "Before" fraction should look heavy or cluttered (bloated with factors), while the "After" fraction looks light, healthy, and simplified. They should visually represent the "removed" primes as little germs or heavy weights that were taken away.
Fraction Surgery Slides Presentation Fraction Surgery
Prime Factorization Ward
Today's Operation
"I can apply the Prime Factorization Method to reduce sick fractions to their healthiest, lowest terms."
Pre-Op Scrub
5 MINS
2s
"Even numbers only!"
3s
"Sum the digits!"
5s
"Ends in 0 or 5!"
Can you list the first 5 prime numbers?
Observation Room
LIVE FEED
Embedded media
Watch for:
The "Prime Trio" (2, 3, 5)
Sequential Testing
"Pulling out" the factor
The Diagnostic List
Prime Numbers
"A whole number greater than 1 that is divisible only by 1 and itself."
2 3 5 7 11
Step 1: Test #2
Can BOTH numbers be cut in half?
Step 2: Test #3
If 2 fails, can 3 go into both?
Step 3: Repeat
Keep testing until only "1" can go into both.
Operating Room Instructions
1
Identify the Sick Fraction on your patient card.
2
Circle extracted primes in Blue (Top) and Red (Bottom).
3
Heal the fraction!
Surgeon's Oath:
"I will never change the value of a fraction, only its appearance for clarity."
Fraction Surgery Worksheet Document Fraction Surgery
St. Math-ew's General Hospital • Grade 5 Wing
Lead Surgeon:
Operation Date:
Surgical Protocol: Extract prime factors (2, 3, 5, etc.) from the numerator and denominator. Use your Blue Pencil for the numerator and your Red Pencil for the denominator. The fraction is "Healed" when no more prime factors can be extracted.
Patient #1 Status: Unreduced
12
18
Extraction Area
Healthy
Patient #2 Status: Unreduced
20
50
Extraction Area
Healthy
Patient #3 Status: Unreduced
15
45
Extraction Area
Healthy
Patient #4 Status: Unreduced
24
60
Extraction Area
Healthy
Patient #5 Status: Unreduced
42
70
Extraction Area
Healthy
Emergency Case
Patient #6 Status: Critical
30
120
Intensive Care
Healthy
Scalpel Ready
Primes Diagnostic
Stable Condition
Medical Discharge Reflection Document Discharge Report
Surgery Post-Operation Reflection
Authorization #
5-PRIME-DISCHARGE
Patient Selection
Sick Patient ID
"Choose the fraction that was the most difficult to cure. This patient required precise surgical maneuvers and multiple rounds of prime factor extraction."
Surgical Summary
Explain your process for healing this fraction. Which primes did you pull out? How did you diagnostic rules (like testing for 2s, 3s, or 5s) help you? How did you know the operation was complete?
Surgical Checklist:
Prime Trio Used (2, 3, 5)
Top/Bottom extraction balanced
Patient is in Lowest Terms
Lead Surgeon Signature
Extension: Poster Surgery
Create a medical poster showing the transformation of your patient. Use the space below to sketch your "Before" and "After" designs.
Before Surgery
Show the fraction bloated with factors and germs.
After Surgery
Show the fraction simplified, light, and healthy!
Surgical Board Requirements:
Draw the "Prime Germs" leaving the body.
Label your final Lowest Terms clearly.
Give your case a medical title (e.g., "The Cure for 24/60ths" ).
