Boss rounds
Level endings that feel like milestones
Each boss round includes a playable three-phase session: warm-up, core challenge, and calm finisher. Clear all three to earn the badge and unlock the certificate.
Boss format
Three steps, one earned clear
1 · Warm-up
2 · Core challenge
3 · Calm finisher
Use the linked lesson, exercise, and worksheet if you want support, then clear the built-in boss session when you are ready.
Boss progress
Milestones completed
Certificate
Print your dojo certificate
When you finish a boss round, you can print a simple certificate that marks the cleared level and the day you earned it.
Preview
Soroban Dojo milestone certificate
Earn a boss badge to fill this certificate with a completed level and date.
L0
First bead boss
Read and set values without confusing the beam, upper bead, and lower beads.
1. Warm-up
How many lower beads touch the beam to show 4?
2. Core challenge
Write the value shown when one upper bead and two lower beads are active on one rod.
3. Calm finisher
What two-digit number uses 3 tens and 1 one?
Not completed yet.
Boss session
Press play to begin
Start the session to reveal the first boss prompt.
Tip will appear when you start the session.
Clear all three phases to earn the boss badge.
L1
One-rod boss
Use direct addition and subtraction calmly before rushing into complements.
1. Warm-up
Start from 3 and add 4 on one rod.
2. Core challenge
Start from 8 and subtract 3 on one rod.
3. Calm finisher
Solve 4 + 4.
Not completed yet.
Boss session
Press play to begin
Start the session to reveal the first boss prompt.
Tip will appear when you start the session.
Clear all three phases to earn the boss badge.
L2
Complement boss
Prove that five and ten complements are patterns you can trust, not facts you are guessing.
1. Warm-up
What completes 7 to 10?
2. Core challenge
Solve 8 + 7 using complements.
3. Calm finisher
What completes 3 to 5?
Not completed yet.
Boss session
Press play to begin
Start the session to reveal the first boss prompt.
Tip will appear when you start the session.
Clear all three phases to earn the boss badge.
L3
Fluency boss
Keep a stable running total through carries, borrows, and sign changes.
1. Warm-up
Solve 24 + 7 + 1.
2. Core challenge
Solve 46 - 8 + 12.
3. Calm finisher
Solve 58 + 13 - 9.
Not completed yet.
Boss session
Press play to begin
Start the session to reveal the first boss prompt.
Tip will appear when you start the session.
Clear all three phases to earn the boss badge.
L4
Product and quotient boss
Switch between multiplication and division structure without losing place value or fact-family clarity.
1. Warm-up
Solve 12 × 3.
2. Core challenge
Solve 24 ÷ 6.
3. Calm finisher
Solve 23 × 4.
Not completed yet.
Boss session
Press play to begin
Start the session to reveal the first boss prompt.
Tip will appear when you start the session.
Clear all three phases to earn the boss badge.
L5
Mental mastery boss
Hold the full total through sign changes and finish accurately under pace.
1. Warm-up
Solve 18 + 7 - 4 + 5.
2. Core challenge
Solve 42 - 9 + 16 - 3.
3. Calm finisher
Solve 63 + 14 - 8 + 11.
Not completed yet.
Boss session
Press play to begin
Start the session to reveal the first boss prompt.
Tip will appear when you start the session.
Clear all three phases to earn the boss badge.