Check One Addition Worksheet Probe 1 • Level 1 Support Double-Digit Addition (No Regrouping)
Stack Addition Quick Check
Target: 80%+ Accuracy
Score ____ / 10
Student:
Date:
Time:
💡
Stack Strategy: Step 1: Add ONES First ➡️ Step 2: Add TENS
Line up your numbers in columns. Add the green ones column first, then the blue tens column.
Model:
T O
2 4
+1 3
3 7
1 Start ⬇️
T O
2 4
2 Start ⬇️
T O
3 5
3 Start ⬇️
T O
5 1
4 Start ⬇️
T O
1 7
5 Start ⬇️
T O
6 2
6 Start ⬇️
T O
4 3
7 Start ⬇️
T O
2 0
8 Start ⬇️
T O
7 2
9 Start ⬇️
T O
3 3
10 Start ⬇️
T O
1 4
Self Check: Did you add the ONES first? [ ] Yes! [ ] Need help
Stack Method • Double Digit Addition Check 1 of 5
Check Two Addition Worksheet Probe 2 • Level 2 Support Double-Digit Addition (No Regrouping)
Stack Addition Quick Check
Target: 80%+ Accuracy
Score ____ / 10
Student:
Date:
Time:
2
Remember the order: 1. Add Ones (O) → 2. Add Tens (T)
Keep digits aligned in their columns as you solve each problem.
Column Guide: T = Tens | O = Ones
1 Ones 1st ⬇️
T O
3 2
2
T O
4 5
3
T O
2 1
4
T O
5 4
5
T O
1 6
6
T O
6 3
7
T O
3 0
8
T O
2 7
9
T O
7 4
10
T O
3 8
Check: Place value columns aligned
Stack Method • Double Digit Addition Check 2 of 5
Check Three Addition Worksheet Probe 3 • Level 3 Support Double-Digit Addition (No Regrouping)
Stack Addition Quick Check
Target: 80%+ Accuracy
Score ____ / 10
Student:
Date:
Time:
Directions: Solve each stacked addition problem. Remember to add the ones first, then the tens.
Mid-Series Check
1
T O
2 5
2
T O
4 1
3
T O
5 2
4
T O
1 4
5
T O
6 3
6
T O
3 7
7
T O
2 2
8
T O
7 0
9
T O
4 6
10
T O
1 8
Check: Two-digit sums without regrouping
Stack Method • Double Digit Addition Check 3 of 5
Check Four Addition Worksheet Probe 4 • Level 4 Support Double-Digit Addition (No Regrouping)
Stack Addition Quick Check
Target: 80%+ Accuracy
Score ____ / 10
Student:
Date:
Time:
Directions: Find each sum using the vertical stack method. Write your answer neatly below the line.
Near-Independence
1
T O
34
2
T O
51
3
T O
26
4
T O
43
5
T O
62
6
T O
17
7
T O
35
8
T O
73
9
T O
20
10
T O
44
Check: Two-digit sums without regrouping
Stack Method • Double Digit Addition Check 4 of 5
Check Five Addition Worksheet Probe 5 • Independent Mastery Double-Digit Addition (No Regrouping)
Stack Addition Quick Check
Mastery: 8/10+ Final Probe
Score ____ / 10
Student:
Date:
Time:
Directions: Add the numbers below. Show your answer clearly in the space provided.
Independent Format
1
23
2
52
3
36
4
15
5
41
6
64
7
27
8
71
9
33
10
48
Criterion Mastery Check: [ ] ≥ 80% Mastery Achieved [ ] Further Practice Needed
Stack Method • Double Digit Addition Check 5 of 5
Addition Progress Teacher Tracker RTI / MTSS / IEP Data Tool Tier 2/3 Math Intervention
Progress Monitoring Teacher Tracker
Double-Digit Stack Addition (No Regrouping) • 5-Probe Series
Mastery Goal 80% Accuracy (8 / 10 correct)
Student:
Grade:
Teacher/Specialist:
Target Objective: Given 10 two-digit addition problems without regrouping presented vertically, student will solve with ≥ 80% accuracy across 3 consecutive probes with systematically faded visual supports.
1. Probe Administration Log
Record raw score, accuracy %, and notes per check
Probe Scaffolding Level Date Score % Acc. Time Goal? Key Observation / Error Notes Check 1 Level 1: Color Columns + Directional Arrow ___ / 10 ___% [ ] Y [ ] N Check 2 Level 2: T & O Header Labels + Dashed Divider ___ / 10 ___% [ ] Y [ ] N Check 3 Level 3: Faded Lines + Transition Split Box ___ / 10 ___% [ ] Y [ ] N Check 4 Level 4: Minimal T/O Guides, No Dividers ___ / 10 ___% [ ] Y [ ] N Check 5 Level 5: Standard Independent Vertical Algorithm ___ / 10 ___% [ ] Y [ ] N
2. Visual Growth Trend Chart
--- 80% Benchmark
100%
80% Target Aimline
60%
40%
20%
0%
Chk 1
Chk 2
Chk 3
Chk 4
Chk 5
Plot probe scores with dots (•) and connect to monitor trajectory toward 80% goal.
3. Error Pattern Checklist
Directionality / Process:
[ ] Started in Tens column (left-to-right)
[ ] Correctly started in Ones column
Place-Value Alignment:
[ ] Misaligned digits in sum answer space
[ ] Kept distinct column placement
Basic Fact Retrieval:
[ ] Single-digit fact error (sums ≤ 9)
