• About mathseconds
  • Developed by Wonhee Jung for his daughters and his students at ODLHÁ
• Elementary
  • Counting and Cardinality
    • Compare Numbers (K.CC.C.7)
  • Operations and Algebraic Thinking
    • Find 1 - 9 That Makes 10 (K.OA.A.4)
    • Add Integers 1 - 9 (K.OA.A.5)
    • Subtract Integers 1 - 9 (K.OA.A.5)
  • Number and Operations in Base 10
    • Add 10 and a 1-Digit Number (K.NBT.1)
    • Compare 2-Digit Numbers (1.NBT.3)
    • Add 2-Digit Numbers Within 100 (1.NBT.4)
    • Subtract 2-Digit Numbers Within 100 (1.NBT.6)
• Middle
  • Exponents
    • Properties of Integer Exponents (8.EE.1)
    • Square Roots and Cube Roots (8.EE.2)
    • Rational and Irrational Numbers
    • Scientific Numbers
    • Operations with Scientific Numbers
  • Fractions
    • Factors and Multiples (6.NS.4)
    • Reduce Fractions
    • Improper and Mixed Fractions
    • Add and Subtract Fractions
• High
  • Algebra 1
    • Compare Univariate Distributions (S.ID.A)
    • Interpret Solutions (A.REI.D.10)
    • Solve Equations - Graph (A.REI.3)
    • Solve Equations (A.REI.3)
    • Solve Linear Inequalities (One-Step) (A.REI.3)
    • Solve Systems of Linear Equations (A.REI.6)
    • Solve Linear Inequalities (Multi-Step) (A.CED.1)
    • Create and Graph Equations (A.CED.2)
    • Write Linear Inequalities (A.CED.3)
    • Interpret the Solution to Inequalities in Context (A.REI.3)
  • Algebra 2
    • Sequences (F.BF.A.2)
    • Polynomial Operations (A.APR.1)
    • Zeros of Polynomials (A.APR.3)
    • System of a Linear and a Quadratic Polynomial (A.REI.C.7)
    • Polynomial Graphs (F.IF.7)
    • Rewriting Rational Expression (A.APR.D.6)
    • Vertical and Horizontal Asymptotes of Rational Functions (F.IF.7)
    • Solve Rational Equations (A-REI.A.2)
    • Interpret Rational Functions (F-IF.B.4)
    • Create Rational Functions (Surface Area of Prisms) (A-REI.A.2)
    • Create Rational Functions (Projectile Motion) (A-CED.A.2)