K-12math.info

Most frequently used terms in 21st century (2002-2016) second grade (age 7) textbooks

Out of 1000 terms - 179 different terms were used in second grade student materials
average 65 terms were used per textbook


Series information

11. Houghton Mifflin(2002)

12. McGraw-Hill/Glencoe (2002)

13. OpenSTAX/CNX/Siyavula Grades 1-9 (2009)
--- Grades 10 and 11 (2011)(OER)*
South Africa edition

14. CK-12 Mathematics 1-5 (2015)
--- (OER but not textbooks)
--- CK-12 Mathematics 6-11 (2012) (OER)*

15. Bangladesh Mathematics 1-7 (2013)
--- (OA)** (Online no longer available)

16. McGraw-Hill/Glencoe (2013/2014)

17. Math in Focus - Singapore Math
Dist. by Houghton Mifflin Harcourt K-8 (2013/2015)

18. AAAKnow (formally AAAMath) K-8 (2014)
--- (Copyrighted and not textbooks)

19. Houghton Mifflin K-8 (2015)

20. Khan Academy K-8 (2015)
--- (OER not textbooks) --

Code:
USAGE CODE:

4 Term used (formally developed)
3 Term used (to support formal development)
2 Synonym of term used
1 Term used (enrichment)
- Term not present
--- Textbook not available


Range of Terms
(from most frequent)
Textbook series ( Usage Code )
>> Series number >>>
HM
text
11

McG
text
12
CNX OER
text
13
CK-12 OER
Video
14

Bangladash
text
15

McG
text
16

Singapore
text
17

AAA
video
18

HM
text
19

Khan
video
20
PLACE VALUE 33 3 134313 1
ADDITION (WHOLE) 33 3 133413 1
SUBTRACTION 33 3 133413 1
WORD PROBLEMS (WHOLE) 22 2 122222 1
MONEY 44 4 123323 1
TIME 44 3 134413 1
COUNTING 33 3 133313 -
INEQUALITY 22 - 222222 2
TRIANGLE33 3 133313 -
EVEN AND ODD NUMBER 44 2 - 34414 -
ADD BY REGROUPING 43 3 1 -44 -3 1
CIRCLE 33 3 1333 - - 1
CYLINDER 33 3 1333 -3 -
NUMBER SENTENCE 33 3 2 -3213 -
INEQUALITY SIGN 32 - - -4413 2
ADD AND SUBTRACTION RELATION33 - - 34313 -
MULTIPLICATION (WHOLE) 44 3 134 -1 - -
REPEATED ADDITION -3 2 - -4313 1
FRACTION 44 2 13 -41 - -
ONE HALF -2 4 - 33312 -
RECTANGLE 33 3 1 - -3 -3 1
FACE (POLYHEDRON) 43 3 1 -43 -3 -
BAR GRAPH 33 2 - -43 -4 1
WRITING NUMBERS 3 - - - 333 -3 1
ADDEND (WHOLE) 33 - 1 -4 -13 -
MULTIPLES OF FIVE 2 - 3 - 22 -2 - 2
MULTIPLES OF TEN 2 - 3 - -222 - 2
MULTIPLES OF TWO 22 2 - -222 - -
THREE ADDENDS 33 - 1 -3 -22 -
APPROXIMATION - - 2 2 -22 -2 2
RULER 3 - 3 - 233 -3 -
WEIGHT 33 2 - 3 -21 - -
CENTIMETER 33 - - 334 -3 -
FOOT 33 - - -4414 -
LENGTH 33 3 - -3 - -3 1
MEASUREMENT (LENGTH 3 - - 1 - -313 1
QUADRILATERAL -3 - - 33313 -
SQUARE 33 3 1 - -3 -3 -
CONE 33 - - 333 -3 -
CUBE 33 - 1 -33 -3 -
RECTANGULAR PRISM 33 - 1 -33 -3 -
PROBLEM SOLVING 32 2 - -32 -2 -
PICTOGRAPH 44 - - -22 -2 2
EXPANDED FORM -3 - 1 -431 - -
ORDERING 33 2 - - -41 - -
ADD BY NUMBER LINE 33 - - -32 - - 1
ADD. COMBINATIONS (WHOLE) 2 - 2 - -2 -22 -
COMMUTATIVE (ADD.) 22 2 - -4 - -2 -
DIVISION (WHOLE) 43 - - 3 -41 - -
ESTIMATING SUMS 34 - 2 - -312 -
MULT. COMBINATIONS -2 2 - 2 -22 - -
REPEATED SUBT. 23 - - 2 -31 - -
SUBT. (TWO PLACE) 43 - - -3 -23 -
MEASUREMENT 23 2 13 - - - - -
LIQUID MEASURE 22 2 - 3 -2 - - -
SHAPE - - 3 13 -3 - - 1
INCH 33 - - - -413 -
METRIC UNITS - - 2 1 - -212 -
HEXAGON -3 - - -3313 -
PYRAMID 33 3 - -33 - - -
VERTICES (SOLIDS) 43 - 1 -4 - -4 -
AFTER CONCEPT 33 3 - - - -1 - -
BEFORE CONCEPT 33 3 - - - -1 - -
MENTAL ARITHMETIC 2 - - - -331 - -
NUMBER LINE 33 3 - - -3 - - -
ROUNDING 3 - 4 - - -41 - -
COLUMN ADDITION - - 2 - -2 - -3 2
SYMBOLS FOR MULTIPLICATION. 2 - 3 - 3 -3 - - -
CONGRUENT PARTS (FRACTION) 2 - - - -22 -2 -
COMPARISON - - 2 1 -33 - - -
TEMPERATURE 33 3 - - - - - - -
ANGLE -3 - - -33 -3 -
EDGE (POLYHEDRON) 4 - - 1 -4 - -3 -
SPHERE 33 - 1 -3 - - - -
SET -3 - 1 - -3 - - -
BETWEENNESS 3 - 3 - - - -1 - -
EQUALITY - - - - -2 -22 -
ORDINAL NUMBER -4 2 - 3 - -1 - -
IDENTITY (ADDITION) - - 2 - -42 - - -
MULT. BY GROUPING 32 - 1 - - - - - -
SYMBOLS FOR ADDITION - - 3 - - - -13 -
SYMBOLS FOR DIVSION - - - - 3 -31 - -
ADDITION (FRACTION) - - - 2 - -31 - -
DECIMAL 1 - - 1 - - -1 - -
DECIMAL NOTATION 2 - - - - - -12 -
UNIT LENGTH - - 2 1 - - - -2 -
PERIMETER 44 - 1 - - - - - -
AREA 43 - 1 - - - - - -
TRAPEZOID -3 - 1 - -3 - - -
PENTAGON 3 - - - -3 -13 -
THREE DIMENSION - - - 2 -3 - -3 -
EQUATION - - - 1 - - -13 -
COLLECTING 2 - 2 - -2 - - - -
FREQUENCY TABLE - - - - -22 -2 -
INTERPRETATION -2 - - -22 - - -
TABLES 33 - - -3 - - - -
NUMERATION SYSTEM - - 2 - - - -2 - -
ARRAY (MULT.) (WHOLE) -3 - - -4 - - - -
DIVISOR QUOTIENT -2 - - - - -1 - -
MULT. AND DIVISION - - - - 2 -3 - - -
MULT. PROPERTIES 1 - - - - -2 - - -
REMAINDER 43 - - - - - - - -
INEQUALITY (FRACTION) 2 - - - - -2 - - -
PIE APPROACH - - - - 2 -2 - - -
SUBTRACTION (FRACTION) - - - - - -31 - -
TENTHS HUNDREDTHS - - - 1 - - -1 - -
WORD PROBLEM (DECIMAL) - - - 2 - - -2 - -
MAP INTERPRETATION - - 2 1 - - - - - -
ENGLISH UNITS - - - 1 - -2 - - -
KILOMETER - - 3 - -4 - - - -
UNIT AREA 2 - - - - - - -2 2
VOLUME - - - 1 - -4 - - -
LINE - - - 1 - -3 - - -
POLYGON - - - 1 - - -1 - -
NAMING OF POLYGONS - - - - - - -1 - 2
CURVE - - - 1 - -3 - - -
SOLID 3 - - - - -3 - - -
PLACEHOLDER - - 2 - - - - -3 -
MODE 44 - - - - - - - -
RANGE (STATISTICS) 44 - - - - - - - -
NUMBER AND NUMERAL - - - - - - -2 - -
ABACUS - - - - 2 - - - - -
GROUP -3 - - - - - - - -
MAGIC SQUARE -1 - - - - - - - -
RENAME NUMBERS - - 3 - - - - - - -
SEQUENCE - - - - - - -1 - -
WHOLE NUMBER - - - 1 - - - - - -
DIVISION COMBINATIONS - - - - - - -2 - -
FACTOR (WHOLE) -3 - - - - - - - -
MIXED OPERATIONS - - - 1 - - - - - -
COMMON FRACTION - - - - - -2 - - -
DENOMINATOR - - - - - - -1 - -
EQUIVALENT FRACTIONS -2 - - - - - - - -
GREATER THAN (FRACTION) - - - - - - -2 - -
NUMERATOR - - - - - - -1 - -
WORD PROBLEM (FRACTION) -2 - - - - - - - -
EQUIVALENT DECIMAL - - - 1 - - - - - -
FRACTION TO DECIMAL - - - - - - -1 - -
INEQUALITY (DECIMAL) - - - 1 - - - - - -
ORDERING DECIMALS - - - 1 - - - - - -
PLACE VALUE (DECIMAL) - - - 1 - - - - - -
ROUNDING DECIMALS - - - 1 - - - - - -
THOUSANDTHS - - - 1 - - - - - -
CENTIGRADE SCALE - - 2 - - - - - - -
FAHRENHEIT SCALE 3 - - - - - - - - -
UNIT VOLUME - - - - - - - -2 -
CAPACITY - - - 1 - - - - - -
POINT - - - - - - - -3 -
MIDPOINT - - 2 - - - - - - -
PARALLEL LINES - - - 1 - - - - - -
PERPENDICULAR LINES - - - 1 - - - - - -
STRAIGHT LINE - - - 1 - - - - - -
TRANSVERSAL - - - 1 - - - - - -
ACUTE TRIANGLE - - - - - - -1 - -
CONGRUENT TRIANGLES 2 - - - - - - - - -
EQUILATERAL TRI. - - - - - - -1 - -
ISOSCELES TRIANGLE - - - - - - -1 - -
RIGHT TRIANGLE - - - - - - -1 - -
SCALENE TRIANGLE - - - - - - -1 - -
PARALLELOGRAM -3 - - - - - - - -
RECOGNITION OF - - 2 - - - - - - -
RHOMBUS - - - 1 - - - - - -
CONGRUENT POLYGONS -2 - - - - - - - -
ELLIPSE - - - 1 - - - - - -
SEMICIRCLE - - - 1 - - - - - -
PLANE - - - - - -4 - - -
POLYHEDRON - - - 2 - - - - - -
TRIANGULAR PRISM - - 3 - - - - - - -
SYMMETRY 3 - - - - - - - - -
TRUE AND FALSE - - 3 - - - - - - -
DISTANCE - - - 1 - - - - - -
CALCULATOR - - - - - - -1 - -
ESTIMATE - - 3 - - - - - - -
FLOW CHART - - - 1 - - - - - -
UNKNOWN - - - - - - -1 - -
GRAPH - - 3 - - - - - - -
LINE GRAPH - - - - - - - - - 2
PERCENTAGE GRAPH - - - - - - - - - 2
PROBABILITY -2 - - - - - - - -

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