Sansuu Step

Fun Math with the CRA Method

$2.99 · Designed for iPad. Not verified for macOS.

iPad

Proven by 30+ studies! Kids touch, see, and truly get math. Move wooden blocks to visualize the "why." The CRA method conquers carrying, times tables, fractions. 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!

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    Information

    Seller
    daijiro makabe
    Size
    4.9 MB
    Category
    Education
    Compatibility
    Requires iPadOS 17.6 or later.
    • iPad
      Requires iPadOS 17.6 or later.
    • Mac
      Requires macOS 14.6 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.3 or later.
    Languages
    English and Japanese
    Age Rating
    4+
    Copyright
    © 2025 眞壁大二朗
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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