Description
Sansuu Step is a comprehensive math learning app for children aged 2-12, featuring the scientifically proven CRA (Concrete-Representational-Abstract) learning method and spaced repetition system.
[Why Math Step?]
Many children struggle with math because they only learn with abstract numbers. This app uses the CRA method - proven effective in 30+ research studies (effect size g=0.997) - to help children truly understand math by touching, seeing, and thinking.
[The CRA Learning Method]
Step 1: Concrete
Drag and move wooden blocks to understand numbers through touch.
Step 2: Representational
Use ten frames and number lines to see number relationships.
Step 3: Abstract
Solve problems with numbers. Stuck? Return to previous steps anytime.
[Features]
1. Preschool Mode (Ages 2-5)
Five fun activities to build number foundations:
- Finger Counting: Tap and count 1-3, 1-5, or 1-10 with voice
- Number Order: Tap numbers in sequence like a board game
- How Many?: Count objects and match to numbers
- Which is More?: Compare groups and tap the bigger one
- Feed the Animals: Drag food for one-to-one matching
2. Calculation Learning (6 Levels)
[Level 1] Foundation (Ages 4-6)
- Addition without carrying: 3+2=5
- Subtraction without borrowing: 5-2=3
- Numbers to 100 and place value
[Level 2] Carrying and Borrowing (Ages 6-7)
- Addition with carrying: 8+5=13
- Two-digit addition: 23+19
- Subtraction with borrowing: 13-5=8
- Numbers to 1000
[Level 3] Multiplication, Division, Decimals (Ages 7-9)
- Times tables: 2-5, 6-9, all
- Division and remainders
- Decimals: 0.1 to 9.9
- Numbers to 10000
[Level 4] Fractions and Advanced (Ages 8-10)
- Fraction basics: 1/2, 1/3, 1/4
- Simplification: 4/6 to 2/3
- Decimal addition and subtraction
- Large numbers (millions, billions)
- Multi-digit multiplication
- Two-digit division
[Level 5] Fraction Calculations (Ages 9-11)
- Fraction addition and subtraction
- Fraction multiplication
- Multiples and factors
- GCD and LCM
- Decimal multiplication and division
[Level 6] Ratios and Algebra (Ages 10-12)
- Fraction division
- Fraction-decimal conversion
- Ratios and equivalent ratios
- Find x, express with x
- Percentages
- Speed calculations
3. Memorization Mode
Build speed with flashcards:
- Complements of 10: 1+9, 2+8... (under 1 sec)
- Complements of 5 (under 1 sec)
- Doubles: 2+2, 3+3, 4+4
- Times Tables: 81 problems (under 2 sec)
- Square Numbers with visual blocks
Practice mode and Time Attack included.
4. Spaced Repetition
Review at optimal intervals based on the forgetting curve:
- Immediately, 1 day, 3 days, 1 week, 2 weeks
Missed problems are prioritized.
5. 3-Level Hints
Guides thinking without giving answers:
- Hint 1: "Try making 10!"
- Hint 2: "What plus 7 makes 10?"
- Hint 3: Show ten frame visual
[Visual Learning Tools]
- Ten Frames: See groups of 10
- Number Lines: Visualize calculations
- Blocks: Hands-on manipulation
- Cherry Calculation: Break down carrying
[Design]
Warm, wooden toy-inspired UI. Large buttons for little fingers. Voice guidance. Short sessions for young learners.
[Scientific Backing]
- CRA Method: g=0.997 (30 studies)
- Visual Manipulatives: g=0.55
- Spaced Repetition: d=0.54
[Ages] 2-12
[Safety]
- No ads
- No in-app purchases
- No data collection
- Works offline
- COPPA compliant
Build math confidence with Sansuu Step!