 Frequently accessed terms
 Set, Logic, Number Theory terms
 Whole number, Fraction, Decimal, Integer, Rational Number, Real Number, Complex Number terms
 Measurement, Standard Units, Length, Area, Volume terms
 Point, Line, Angle, Triangle, Quadrilateral, Polygon, Circle, Plane terms
 Polyhedron, Trigonometry, Vector, Transformation Geometry, Topology, Other Geometries
 Relation, Exponent, Equation, Function, Equation (2 variables), Polynomial, Rational Expression, Quadratic terms
 Coordinate System, Problem Solving, Statistics, Probability, Progression, Logarithm, Matrix, Calculus terms
 Textbook Series Reviewed
 Series resources with links
 Reviewing Criteria
The world at large:
 The Commonwealth Educational Media Centre for Asia in New Delhi recently (2013) released
Quality Assurance Guidelines for Open Educational Resources: TIPS Framework Version 1.0 which provides a great deal of information on OER.
 Bangladesh's Elementary and Secondary School Math 2013 open access textbook series has been taken off line. For those who downloaded the textbooks, the information on this site should still match the 2013 edition.
 African Teacher Education OER Network
South African Institute for Distance Education (SAIDE)
 From African Teacher Education OER Network Exploring What It Means To Do Mathematics. (download: unit1word.doc )
 What is ethnomathematics ?
These are a few sources for ideas that may help in your efforts to produce materials for your learning community. Please check and respect their TERMS OF USE.
 Teaching OER Mathematics using OER resources.
 Creating a K5th grade OER series to complete the 6th to 12th grade CK12 math textbook series.

A+ Click's challenging online math problem sets
 Money as you Learn is a tool for Educators to Integrate Personal Finance into k12 mathematics.
 Key points in Writing a textbook. (Especially "Keep the text simple..." paragraph)
 Interesting kindergarten level example:
KinderWeb by Brian Petro.
 Jenny Eather's A Maths Dictionary for Kids is a good source for lower grade levels.
 CoolMath.com dictionary has been on line since 1997.
 John Pages's Math Open Reference (Algebra/Geometry reference)
 James Sousa's Arithmetic videos
 Wikispaces provides activities by grade level
 Wikieducator's Math Glossary
 PBS LearningMedia *
 The National Council of Teachers of Mathematics Illuminations
 Check out the OER Commons website for ideas to develop or incorporate into your materials.
About K12math.info
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United Nations honors K12math.info
Singapore Math added. Khan Academy links updated.
Merlot top 5 star educational resource.
10 years of serving math education.
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What others think.
Thanks to many who helped this Website.
Why 1972 ? • Content patterns.

Kindergarten (median age 5)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Key textbook content 19722015 (alphabetical order)
4. Key textbook content 19722015 (most frequently used order)
5. Curriculum Parameters
6. Life outside the classroom
7. Content by textbook in page number order
8. PBS Kindergarten level 
About PBS LearningMedia *
First grade (median age 6)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Key textbook content 19722015 (alphabetical order)
4. Key textbook content 19722015 (most frequently used order)
5. Curriculum Parameters
6. Life outside the classroom
7. Content by textbook in page number order
8. A+Click : Online Math Problems
 About A+Click
9. PBS Grade 1 
About PBS LearningMedia *
Second grade (median age 7)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Key textbook content 19722015(alphabetical order)
4. Key textbook content 19722015 (most frequently used order)
5. Curriculum Parameters
6. Life outside the classroom
7. Content by textbook in page number order
8. A+Click : Online Math Problems
 About A+Click
9. PBS Grade 2 
About PBS LearningMedia *
Third grade (median age 8)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Key textbook content 19722015 (alphabetical order)
4. Key textbook content 19722015 (most frequently used order)
5. Curriculum Parameters
6. Life outside the classroom
7. Content by textbook in page number order
8. A+Click : Online Math Problems
 About A+Click
9. PBS Grade 3 
About PBS LearningMedia *
Fourth grade (median age 9)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Key textbook content 19722015 (alphabetical order)
4. Key textbook content 19722015 (most frequently used order)
5. Curriculum Parameters
6. Life outside the classroom
7. Content by textbook in page number order
8. A+Click : Online Math Problems
 About A+Click
9. PBS Grade 4 
About PBS LearningMedia *
Fifth grade (median age 10)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Key textbook content 19722015 (alphabetical order)
4. Key textbook content 19722015 (most frequently used order)
5. Curriculum Parameters
6. Life outside the classroom
7. Content by textbook in page number order
8. A+Click : Online Math Problems
 About A+Click
9. PBS Grade 5 
About PBS LearningMedia *
Sixth grade (median age 11)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Key textbook content 19722015 (alphabetical order)
4. Key textbook content 19722015 (most frequently used order)
5. Curriculum Parameters
6. Life outside the classroom
7. Content by textbook in page number order
8. A+Click : Online Math Problems
 About A+Click
9. PBS Grade 6 
About PBS LearningMedia *
Seventh grade (median age 12)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Key textbook content 19722015 (alphabetical order)
4. Key textbook content 19722015 (most frequently used order)
5. Curriculum Parameters
6. Life outside the classroom
7. A+Click : Online Math Problems
 About A+Click
9. PBS Grade 7 
About PBS LearningMedia *
Eighth grade (median age 13)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Key textbook content 19722015 (alphabetical order)
4. Key textbook content 19722015 (most frequently used order)
5. Curriculum Parameters
6. Life outside the classroom
7. A+Click : Online Math Problems
 About A+Click
8. PBS Grade 8 
About PBS LearningMedia *
Ninth grade (median age 14)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Content w/CNX and CK12 2.0 version (alphabetical order)
4. Content w/CNX and CK12 2.0 version (most frequently used order)
5. Curriculum Parameters
6. Life outside the classroom
7. A+Click : Online Math Problems
 About A+Click
8. PBS Grade 9 
About PBS LearningMedia *
Tenth grade (median age 15)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Content w/CNX and CK12 2.0 version (alphabetical order)
4. Content w/CNX and CK12 2.0 version (most frequently used order)
5. Curriculum Parameters
6. Life outside the classroom
7. A+Click : Online Math Problems
 About A+Click
8. PBS Grade 10 
About PBS LearningMedia *
Eleventh grade (median age 16)
1. Standards
2. Key textbook content 20022016 (most frequently used order)
3. Content w/CNX and CK12 2.0 version (alphabetical order)
4. Content w/CNX and CK12 2.0 version (most frequently used order)
5. Curriculum Parameters
6. Life outside the classroom
7. A+Click : Online Math Problems
 About A+Click
8. PBS Grade 11 
About PBS LearningMedia *
* As most of the PBS learning items under each grade level maybe used for multiple grade levels 
determine the appropriateness of the learning item before using. Unfortunately Curriki
or OER Commons assign individual learning items to multiple grade levels (k2, 35, 68, 912) which makes it diffucult to
include their materials in K12math.info.
Please respect the TERMS OF USE statement that appears at the bottom of the sites this website links to.
Thank you.
