Number Chomper Anchor Poster Math Anchor Chart • Place Value
🐊 Comparing 2-Digit Numbers 🐊
Always feed the hungry alligator the GREATER number!
1
Look at TENS First!
Compare the digits in the tens place . The number with MORE tens is always greater!
62
6 Tens
>
48
4 Tens
6 tens is greater than 4 tens!
2
Tied? Check ONES!
If the tens digits are the same , look at the digits in the ones place .
54
4 Ones
<
59
9 Ones
5 tens tie → 4 ones is less than 9 ones!
Master The Three Comparison Symbols
Greater Than
>
Mouth opens to the left !
75 > 32
Less Than
<
Mouth opens to the right !
28 < 64
Equal To
=
Both numbers have the same value !
51 = 51
💡
Chomper's Secret Rule:
The wide-open jaws always point toward the number with more value, while the tiny point points at the smaller number!
Comparison Symbol Cutouts Hands-On Manipulative Kit
✂️ Comparison Symbol Cutouts
Cut along the dashed lines. Sized to fit the center target on the Block Battles Showdown Mat .
Classroom Value 4 Sets Per Page
Set 1 • Pair A > < =
Greater
>
Eats Left
Less
<
Eats Right
Equal
=
Same
Set 2 • Pair B > < =
Greater
>
Eats Left
Less
<
Eats Right
Equal
=
Same
Set 3 • Pair C > < =
Greater
>
Eats Left
Less
<
Eats Right
Equal
=
Same
Set 4 • Pair D > < =
Greater
>
Eats Left
Less
<
Eats Right
Equal
=
Same
💡 Teacher Tip: Print on cardstock and store in snack-sized baggies for zero-fuss hands-on math stations!
Block Battles Showdown Mat ⚔️
Block Battles Showdown Mat
Day 1 • Build with Blocks & Place Your Symbol
Hands-On Lab Part 1 • Front
Name:
Date:
Directions: 1. Build each number with blocks. 2. Place your symbol card in the box. 3. Write >, <, or = in the circle.
Showdown 1 Compare Tens First
First Number 42
Build 42 Here
Place Card
> / < / = Symbol Card Slot
Write Symbol:
Second Number 24
Build 24 Here
Showdown 2 Tied Tens! Check Ones
First Number 57
Build 57 Here
Place Card
> / < / = Symbol Card Slot
Write Symbol:
Second Number 53
Build 53 Here
👉 Turn over to complete Showdowns 3 & 4!
🐊
Block Battles Showdown Mat
Part 2 • Showdowns 3 & 4
Back Page
Showdown 3 Watch Out for the 9! Check Tens First
First Number 39
Build 39 Here
Place Card
> / < / = Symbol Card Slot
Write Symbol:
Second Number 41
Build 41 Here
Showdown 4 Same Tens & Same Ones!
First Number 83
Build 83 Here
Place Card
> / < / = Symbol Card Slot
Write Symbol:
Second Number 83
Build 83 Here
🗣️
Partner Math Talk Frame:
“_____ is greater than / less than / equal to _____ because _____ tens is [more than / less than / equal to] _____ tens.”
Tactile Showdown Lesson Plan 📋
Day 1 of 2 Concrete • Manipulative Phase
Tactile Showdown Lesson Plan
⏱️ 45-Minute Math Block CCSS: 1.NBT.B.3 • 2.NBT.A.4
🎯 Learning Objectives & Focus
SWBAT construct two-digit numbers using physical base-ten rods and unit cubes directly in showdown bays.SWBAT inspect the tens place first to determine greater value.SWBAT place physical symbol cards (>, <, =) between numbers and write the symbol in their recording circle.
🎒 Materials Needed
• Number Chomper Anchor Poster
• Block Battles Showdown Mat (1 per student)
• Comparison Symbol Cutouts (>, <, =)
• Base-Ten Blocks (rods & cubes)
• Pencils
1
Hook & Anchor Introduction (7 mins)
0:00 – 0:07
Gather students around the Number Chomper Anchor Poster . Introduce Chomper the hungry alligator who always faces the greater number.
Key Rule: “Chomper knows tens are the heavy hitters! Always compare the tens digit first. If the tens tie, only then do we check the ones!”
2
I Do / We Do: Showdown Mat Routine (10 mins)
0:07 – 0:17
Identify Numbers: Look at Showdown 1 on the mat: 42 and 24 .Build On the Mat: Place 4 rods and 2 cubes directly in the 42 bay; place 2 rods and 4 cubes in the 24 bay.Compare: Count the rods: “4 tens is greater than 2 tens!” Place Symbol: Drop the > card directly into the center symbol slot.Record: Write > into the circle underneath. Choral read the partner talk frame!
3
You Do: Partner Showdown Battles (22 mins)
0:17 – 0:39
Students complete Showdowns 1–4 on their mats with a partner. Partner 1 builds Number A, Partner 2 builds Number B. Together, they drop the symbol card into the middle slot, recite the talk frame, and record their symbol in the circle.
4
Debrief & Tie-Breaker Discussion (6 mins)
0:39 – 0:45
Review Showdown 2 (57 vs 53) and Showdown 4 (83 vs 83). Discuss: “How did building with blocks make the tie-breaker clear?” (Students saw 5 rods tied, but 7 unit cubes beat 3 unit cubes).
Symbol Sleuths Practice Worksheet 🕵️♂️
Symbol Sleuths Practice Worksheet
Day 2 • Paper-Based Comparison Mastery
Independent Practice Part 1 • Front
Name:
Date:
🔍 Sleuth Rule: 1. Check TENS first. 2. If tens tie, check ONES . Symbols: >, <, =
1 Compare the numbers. Write >, <, or = in the circle.
58
52
27
72
84
84
91
89
36
63
70
70
19
21
65
68
40
39
74
47
33
33
88
82
2 Sleuth True or False? Circle TRUE or FALSE for each statement.
45 > 54
TRUE FALSE
73 > 69
TRUE FALSE
38 < 83
TRUE FALSE
90 = 90
TRUE FALSE
62 < 26
TRUE FALSE
51 > 57
TRUE FALSE
👉 Turn over the page to complete Part 2!
🔎
Symbol Sleuths Practice Worksheet
Part 2 • Extra Practice & Mastery
Back Page
3 Compare the numbers. Write >, <, or = in the circle.
64
46
50
50
79
81
32
23
48
48
95
93
17
71
86
89
30
29
54
54
67
76
99
98
4 Sleuth True or False? Circle TRUE or FALSE for each statement.
82 > 28
TRUE FALSE
34 < 31
TRUE FALSE
77 = 77
TRUE FALSE
65 > 56
TRUE FALSE
49 < 46
TRUE FALSE
18 < 81
TRUE FALSE
🌟 Great job, Number Detective! You compared tens first and cracked the code!
Chomper Check Exit Ticket 🐊
Chomper Check Exit Ticket
Comparing 2-Digit Numbers • Quick Check
Score
/ 6
Name:
Date:
Compare each pair of numbers. Write > , < , or = in the circle:
47
39
82
85
60
60
29
92
53
35
74
78
Remember: The hungry chomper always eats the greater number! 🐊
✂️
Cut Here • 2 Tickets Per Page
✂️
🐊
Chomper Check Exit Ticket
Comparing 2-Digit Numbers • Quick Check
Score
/ 6
Name:
Date:
Compare each pair of numbers. Write > , < , or = in the circle:
47
39
82
85
60
60
29
92
53
35
74
78
Remember: The hungry chomper always eats the greater number! 🐊
Paper Practice Answer Key 🔑
Paper Practice Answer Key
Teacher Solutions • Day 2 Worksheet & Exit Ticket
Grade 1 – 2 Math Master Solutions
1 Worksheet Part 1 (Front) Solutions
12 Comparisons • 6 True/False
Section 1: Number Comparisons
58 > 52
27 < 72
84 = 84
91 > 89
36 < 63
70 = 70
19 < 21
65 < 68
40 > 39
74 > 47
33 = 33
88 > 82
Section 2: True or False
45 > 54 FALSE
73 > 69 TRUE
38 < 83 TRUE
90 = 90 TRUE
62 < 26 FALSE
51 > 57 FALSE
2 Worksheet Part 2 (Back) Solutions
12 Comparisons • 6 True/False
Section 3: Number Comparisons
64 > 46
50 = 50
79 < 81
32 > 23
48 = 48
95 > 93
17 < 71
86 < 89
30 > 29
54 = 54
67 < 76
99 > 98
Section 4: True or False
82 > 28 TRUE
34 < 31 FALSE
77 = 77 TRUE
65 > 56 TRUE
49 < 46 FALSE
18 < 81 TRUE
3 Exit Ticket Quick Check Key
6 Points Total (1 pt per problem)
47 > 39
82 < 85
60 = 60
29 < 92
53 > 35
74 < 78
💡 Scoring & Diagnostic Guide
Digit Reversals (e.g., 29 < 92, 53 > 35): Students who miss these are looking at digit shapes without place value awareness. Refer back to the Day 1 Builder Mat to emphasize position value.
Equal Tens Ties (e.g., 82 < 85, 74 < 78): If students mark these equal, remind them of Rule #2 on the anchor poster: “When tens tie, the ones break the tie!”
Symbol Sleuths Lesson Plan 📋
Day 2 of 2 Abstract • Paper-Based Mastery
Symbol Sleuths Lesson Plan
⏱️ 45-Minute Math Block CCSS: 1.NBT.B.3 • 2.NBT.A.4
🎯 Learning Objectives & Success Criteria
SWBAT compare two two-digit numbers using symbols (>, <, =) without physical manipulatives.SWBAT analyze comparison statements and correctly identify them as TRUE or FALSE .SWBAT demonstrate 80%+ accuracy (5/6 or 6/6) on the Chomper Check Exit Ticket.
🎒 Materials Needed
• Number Chomper Poster (on display)
• Symbol Sleuths Worksheet (front & back)
• Chomper Check Exit Ticket (half-sheet)
• Paper Practice Answer Key
• Pencils and highlighters
1
Kinesthetic Warm-Up & Anchor Recall (5 mins)
0:00 – 0:05
Review the anchor poster. Play “Alligator Arms” : Write two numbers on the whiteboard (e.g., 58 and 52). On the count of three, students open their arms to form >, <, or hold their arms parallel for =.
Key Question: “Both numbers have 5 tens! Which digit decided the winner?” (Students call out: “The ones! 8 is more than 2!”)
2
Guided Practice: Sleuth Strategies (10 mins)
0:05 – 0:15
Handwriting Modeling: Remind students of the primary lines at top: Name takes the full top row, Date sits underneath.Underline Tens First: Model underlining the tens digit in both numbers before writing any symbol.True/False Investigation: Model Problem 13 (45 > 54): “Is 45 greater than 54? 4 tens is less than 5 tens. That statement is false! Circle FALSE.”
3
Independent Symbol Sleuths Practice (22 mins)
0:15 – 0:37
Students complete Part 1 (Front) and Part 2 (Back). Circulate with a highlighter to spot-check. If a student is stuck on a reversal pair (e.g. 27 vs 72), prompt: “Underline the tens digit in green. Which number has more tens?”
4
Chomper Check Exit Ticket (8 mins)
0:37 – 0:45
Distribute half-sheet exit tickets. Students work in silent test conditions to complete the 6 problems. Collect immediately for same-day grading using the Paper Practice Answer Key .
🔍 Diagnostic Observation Notes
