The Core Knowledge Foundation provides open access to content-rich curriculum materials for preschool through grade 8, including the Core Knowledge Curriculum Series™, with many materials now available and many more in development.
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The materials made available for download are freely available for anyone to use, adapt, and share (with attribution), but no one is permitted to sell either the original program, an adaptation of it, or lesson plans that reproduce any part of it. For more information, see the Guidelines to Core Knowledge and the Creative Commons License.
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- CKMath Grade 1 Unit 8: Putting It All Together Grade 1 Mathematics
- CKMath Unit 1: Adding, Subtracting, and Working with Data Grade 1 Mathematics
- CKMath Unit 2: Addition and Subtraction Story Problems Grade 1 Mathematics
- CKMath Unit 3: Adding and Subtracting Within 20 Grade 1 Mathematics
- CKMath Unit 4: Numbers to 99 Grade 1 Mathematics
- CKMath Unit 5: Adding Within 100 Grade 1 Mathematics
- CKMath Unit 6: Length Measurements Within 120 Units Grade 1 Mathematics
- CKMath Unit 7: Geometry and Time Grade 1 Mathematics