Number Power Pretest
Diagnostic Vertical Math Check • Up to 20
Score:
/ 10
Number Power Pretest
Solve each vertical problem. Line up your tens and ones!
Name:
Date:
Helper Number Line (0 to 20) Hop forward for addition (+), hop back for subtraction (−)
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Part 1: Addition Power Add (+)
1
7
2
12
3
8
4
14
5
9
Part 2: Subtraction Power Subtract (−)
6
16
− 4
7
18
− 5
8
15
− 3
9
19
− 7
10
17
− 12
Reflection: How do you feel about these facts?
😊 I feel confident!
🤔 I am getting there
💪 I need more practice
Number Power Posttest
Growth Check Vertical Math Check • Up to 20
Score:
/ 10
Number Power Posttest
Solve each vertical problem. Line up your tens and ones!
Name:
Date:
Helper Number Line (0 to 20) Hop forward for addition (+), hop back for subtraction (−)
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Part 1: Addition Power Add (+)
1
6
2
11
3
9
4
13
5
8
Part 2: Subtraction Power Subtract (−)
6
17
− 4
7
19
− 5
8
16
− 2
9
18
− 6
10
18
− 11
Reflection: How do you feel about your progress?
🚀 Huge growth!
👍 Feeling stronger
🎯 Still practicing
Number Power Answer Key
Teacher Guide Vertical Assessment Key & Diagnostics
Addition & Subtraction to 20
Number Power Answer Key
Quick-grading tables and place-value alignment guide for vertical assessments.
Total Problems: 10 1 point each (10 points max)
Vertical Pretest Answers Diagnostic Form
1. 7 + 5 12
6. 16 − 4 12
2. 12 + 6 18
7. 18 − 5 13
3. 8 + 9 17
8. 15 − 3 12
4. 14 + 3 17
9. 19 − 7 12
5. 9 + 6 15
10. 17 − 12 5
Vertical Posttest Answers Growth Form
1. 6 + 7 13
6. 17 − 4 13
2. 11 + 6 17
7. 19 − 5 14
3. 9 + 8 17
8. 16 − 2 14
4. 13 + 5 18
9. 18 − 6 12
5. 8 + 6 14
10. 18 − 11 7
Item-Level Skill Diagnostics & Vertical Place Value
Make-a-Ten Addition Q1, 3, 5
Decomposing addends to bridge 10 (e.g. \(7 + 5 = 7 + 3 + 2 = 12\)). Check if the 1 is written in the tens column and 2 in the ones column.
Place Value Addition Q2, 4
Adding ones to a teen number without bridging (\(12 + 6 = 18\)). Check that the 6 is correctly added to the 2 ones, keeping the 1 ten intact.
No-Regroup Subtraction Q6 - 10
Minuend ones \(\ge\) subtrahend ones. Focus is on subtracting ones directly in the ones column without any regrouping or borrowing.
Growth Bands & Tiered Next Steps
Mastery (9–10 Correct)
Strong fact fluency and clear vertical column alignment. Ready for 2-digit addition without regrouping and word problem applications.
Approaching (7–8 Correct)
Solid comprehension but may misalign digits or pause on make-ten bridges. Provide vertical grid paper or color-coded columns.
Needs Support (0–6 Correct)
Use physical base-ten blocks (rods and units) placed on top of vertical columns to reinforce that ones subtract from ones.
Vertical Alignment Observation Tip: In Item 10 (\(17 - 12 = 5\) and \(18 - 11 = 7\)), verify that students write the single-digit answer in the ones column and leave the tens column blank (or write a light zero), rather than writing the digit in the tens position.
