Pattern Detectives Facilitation Guide
Facilitation Guide
Lesson: Pattern Detectives (2nd Grade Intervention)
Duration
40 MIN
OBJECTIVE
Students will practice identifying the "rule" between two numbers by observing digit changes in specific place values (+1, +10, +100) or skip-counting patterns (-5).
MATERIALS
- Pattern Detectives Slides
- Base-10 Blocks (Physical or Printable)
- Rule Match Cards (Numbers & Rules)
- Recording Sheet & Pencils
5 MIN
Warm-Up: Block Comparison
Use base-10 blocks to show the difference between 130 and 140.
Teacher Prompt: "Build 130. Now build 140. What did you add to change 130 into 140? Which place value changed?"
15 MIN
Video Viewing: Investigative Pauses
Watch "Number Patterns" and pause at key moments to let students "detect" the rule.
| Timestamp | Action | Investigation Question |
|---|
| 0:10, 0:47, 1:20 | Pause when sequence appears. | "Look at the numbers. Are they getting bigger or smaller? By how much?" |
| Purple Arrow | Pause when rule is shown. | "Build the 'jump' using blocks! (e.g., add one ten rod for +10)." |
| 0:36, 1:10, 1:46 | Pause before final answer. | "Predict the next number on your whiteboard!" |
15 MIN
Main Activity: Rule Match
Pairs or small groups match Number Pair Cards (e.g., 345 & 355) to the correct Rule Card (+1, +10, +100).
Steps:
- Pick a Number Pair card.
- Identify which digit changes.
- Find the Rule Card that matches.
- Record the pattern on the sheet.
Support Tip:
If students struggle, have them build both numbers with blocks and see what's different!
5 MIN
Closure: Reflection
"How do you know if a pattern is +10 or +100 just by looking at the digits?"
Pattern Detectives Slides
Pattern
Detectives
Mission: Crack the Rule
Warm-Up Challenge
130
Start Number
What's the Rule?
140
Target Number
"Build the difference with Base-10 blocks!"
Video Investigation
Follow the Purple Arrow!
Embedded media
Detectives: Watch For...
- Digit changes
- Jumps on arrows
- Plus vs Minus
STOP & BUILD!
When the purple arrow appears, show the jump with your blocks.
Mission: Rule Match
1
Pick a Pair
Choose a Case File card with two numbers on it.
2
Find the Change
Which place value changed? Build it if you're stuck!
3
Match the Rule
Match the case to the Rule Card (+1, +10, or +100).
Record your findings on your Evidence Sheet!
+1
+10
+100
Case Closed!
"How do you know if a pattern is +10 or +100 just by looking at the digits?"
Talk to your partner
Pattern Detectives Evidence Report
Evidence Report
Pattern Detective Case Files
Detective:
Date:
"Pick a Case File number card. Find the rule that connects the numbers. Record your evidence below!"
| Case Number | First Number | The Rule | Second Number |
|---|
| #001 | | | |
| | | |
+1
+10
+100
|
|
| #002 |
|
+1
+10
+100
|
|
| #003 |
|
+1
+10
+100
|
|
| #004 |
|
+1
+10
+100
|
|
| #005 |
|
+1
+10
+100
|
|
Final Deduction:
I know a pattern is +10 when the digit in the place changes.
