SumSpark

SumSpark Practice Lab

Train smarter, one skill at a time

Build a custom mental-math session or let SumSpark recommend what to practice next. No account is required.

Play the Daily Math Game
One-tap Smart Start

Choose how you want to train

Each preset uses your preliminary estimate when available. You can adjust every setting before starting.

Customize session10 questions · Addition, Subtraction · Standard timer
Custom Practice Builder

Create your session

Ready
1. Choose skills

Select one or more operations. Negative numbers can be layered onto the selected operations.

2. Session length
3. Number range
4. Difficulty
5. Timer mode
6. Session options
10 questionsAddition, SubtractionStandard timerAdaptive difficulty on
Your dataPractice data & reset

Skill profiles, configurations, and up to 100 summarized practice sessions are stored in this browser. Analytics never receives equations, typed answers, or personal information.

View Data & Backup
Learn moreHow Practice Lab helps

Explainable adaptation

Difficulty moves only after clear streaks or repeated misses, and never jumps more than one level at a time.

Separate skill levels

Addition, subtraction, multiplication, division, and negative numbers each keep their own XP, speed, accuracy, and mastery state.

Balanced recommendations

Suggestions combine weak spots, slower skills, practice variety, recency, and positive reinforcement instead of always choosing the lowest score.