CCSS.MATH.1.OA.C.6 / TEKS 1.3.D✓ Hawaii State Department of Education Official Framework📚 3 Units • 7 Sequenced Topics
Grade 1 Mathematics: Counting, Place Value & Addition Within 20
Official standards-aligned curriculum for Grade 1 (Elementary) Mathematics. Features sequenced academic units, verified video masterclasses, interactive worked examples with self-checks, common misconceptions, practice drills, and formative quizzes.
Start Interactive Lesson (Solving Linear Equations in One Variable) →Academic Year 2026–27 • Verified Against Official Standards
Unit 1NBT-1
3 Sequenced TopicsPlace Value Structure & Multi-Digit Operations
Deep conceptual exploration of base-ten units, expanded notation, and multi-digit addition and subtraction algorithms.
1.1
Place Value & Expanded Notation⚡ Video Masterclass Aligned✓ Standard Aligned
CCSS.MATH.1.OA.C.6 / TEKS 1.3.D.1 — Understand Place Value Positions in Base-Ten
Master the relationship between adjacent place values and decompose multi-digit numbers into standard and expanded forms.
📺 Featured Masterclass: Math Antics - Place Value by mathantics (09m 40s)
1.2
Multi-Digit Addition & Regrouping⚡ Video Masterclass Aligned✓ Standard Aligned
CCSS.MATH.1.OA.C.6 / TEKS 1.3.D.2 — Fluently Add Multi-Digit Whole Numbers
Execute standard addition algorithms with place-value regrouping across tens and hundreds.
📺 Featured Masterclass: Math Antics - Multi-Digit Addition by mathantics (09m 20s)
1.3
Multi-Digit Subtraction with Decomposition⚡ Video Masterclass Aligned✓ Standard Aligned
CCSS.MATH.1.OA.C.6 / TEKS 1.3.D.3 — Fluently Subtract Multi-Digit Numbers
Subtract multi-digit numbers by decomposing across multiple place values and zeros.
📺 Featured Masterclass: Math Antics - Multi-Digit Subtraction by mathantics (09m 35s)
Unit 2OA-2
2 Sequenced TopicsMultiplication & Division Foundations
Conceptual understanding of equal groupings, arrays, partial products, and standard long division algorithms.
2.1
Multi-Digit Multiplication & Partial Products⚡ Video Masterclass Aligned✓ Standard Aligned
CCSS.MATH.1.OA.C.6 / TEKS 1.3.D.4 — Multiply Multi-Digit Numbers Using Arrays and Algorithms
Understand multi-digit multiplication using area models, partial products, and standard algorithms.
📺 Featured Masterclass: Math Antics - Multi-Digit Multiplication Pt 1 by mathantics (10m 10s)
2.2
Long Division & Remainders⚡ Video Masterclass Aligned✓ Standard Aligned
CCSS.MATH.1.OA.C.6 / TEKS 1.3.D.5 — Find Whole-Number Quotients and Remainders
Master the division algorithm: Divide, Multiply, Subtract, Bring Down, and interpret remainders.
📺 Featured Masterclass: Math Antics - Long Division by mathantics (11m 15s)
Unit 3NF-3
2 Sequenced TopicsFraction Concepts, Equivalence & Operations
Visual models of fractions, number line distances, equivalent fractions, and addition/subtraction of like denominators.
3.1
Fraction Equivalence & Area Models⚡ Video Masterclass Aligned✓ Standard Aligned
CCSS.MATH.1.OA.C.6 / TEKS 1.3.D.6 — Explain Equivalence in Fractions
Understand that two fractions are equivalent if they represent the same size part of a whole.
📺 Featured Masterclass: Math Antics - Fractions Are Parts by mathantics (08m 15s)
3.2
Adding & Subtracting Like Fractions⚡ Video Masterclass Aligned✓ Standard Aligned
CCSS.MATH.1.OA.C.6 / TEKS 1.3.D.7 — Add and Subtract Fractions with Common Denominators
Add and subtract fractions with identical denominators by operating on numerators while keeping the unit size constant.
📺 Featured Masterclass: Math Antics - Adding and Subtracting Fractions by mathantics (09m 55s)