K-12math.info

Most frequently used terms in fourth grade (age 9) textbooks (2002-2019)

Out of 1000 terms - 335 different terms were used in fourth grade student materials
average 123 terms were used per textbook (text)


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 (2013/2015)
Dist. by Houghton Mifflin Harcourt K-8

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

19. Houghton Mifflin K-8 (2015)

20. Khan Academy K-8 (2015)
--- (OER) --

21. Ukuqonda Mathematics 4-10 (2016)
South Africa textbook series

22. NCERT mathematics 1-11 (2019)
India, textbook series


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 >>>
HM (2002)
text
11
McGraw
(2002)
text
12
CNX .
OER
13
CK-12 .
OER
14
Bangladash

text
15
McGraw
(2013)
text
16
Singapore

text
17
AAAKnow .
OA
18
HM (2015}
text
19
Khan
Academy
OER
20
Ukuqonda
S. Africa
text
21
NCERT
India
text
22
TIME13 4 144413 1 4 3
TRIANGLE33 4 143314 1 4 3
FRACTION44 3 143313 1 3 -
PLACE VALUE (NUMBERS)44 4 134313 1 4 -
SUBTRACTION (WHOLE)43 3 144413 1 2 -
DENOMINATOR44 4 144313 1 - -
DECIMAL44 3 124314 1 - -
TENTHS HUNDREDTHS33 3 144413 1 - -
RECTANGLE (AREA)44 3 144413 1 - -
EXPANDED FORM44 2 1 -4413 1 4 -
WHOLE NUMBER33 3 1 -3313 1 4 -
ADDITION (WHOLE)43 3 144 -13 1 4 -
DIVISION (WHOLE)43 - 144413 1 4 3
FACTOR (WHOLE)34 - 133414 1 - -
MULTIPLICATION (WHOLE)43 - 143413 1 4 3
PRIME NUMBER44 - 144414 1 - -
REMAINDER44 - 134414 1 4 -
WORD PROBLEMS (WHOLE)22 2 12322 - 1 2 2
ADDITION (FRACTION)44 - 144413 1 - -
EQUIVALENT FRACTIONS44 4 -44314 1 4 -
NUMERATOR44 4 -44313 1 - -
SUBTRACTION (FRACTION)44 - 144413 1 - -
FRACTION TO DECIMAL43 2 -43413 1 - -
WEIGHT34 2 144323 - - 4
METRIC UNITS33 2 144313 - 2 2
ANGLE44 3 1443 -4 1 - -
ORDERING3 - 2 133313 - 3 2
ROUNDING44 4 - -4313 1 3 -
COMPOSITE NUMBER4 - - 144414 1 - -
DIVISOR QUOTIENT44 - 133413 - - -
MULTIPLE14 3 1344 -4 - 4 -
WORD PROBLEM (FRACTION)22 2 1 -22 -2 1 2 2
ADDITION (DECIMAL)44 - 143413 - - -
DECIMAL NOTATION24 3 -44314 - - -
PLACE VALUE (DECIMAL)33 4 143 -13 - - -
CENTIMETER33 - 133313 - 4 3
ACUTE ANGLE44 - 1344 -4 1 - -
RIGHT ANGLE44 - 1444 -4 1 - -
RIGHT TRIANGLE44 - 124414 - - -
QUADRILATERAL33 4 1 -4 -14 1 4 -
INEQUALITY - - 2 22222 - 2 2 -
INEQUALITY SIGN32 4 -4421 - - 3 -
MULT. AND DIVISION43 - -33313 - 4 2
IMPROPER FRACTION44 4 - -441 - 1 - -
MIXED NUMERAL22 - - -2222 2 - -
MONEY43 - 12 - -23 1 3 3
DEGREE (ANGLE)33 - 1443 -4 - - -
AREA44 - - -4414 1 - -
PARALLEL LINES44 - -444 -4 1 - -
PERPENDICULAR LINES44 - -444 -4 1 - -
RAY44 - -444 -4 1 - -
OBTUSE ANGLE44 - 1 -44 -4 1 - -
ACUTE TRIANGLE44 - 124 -14 - - -
PROBLEM SOLVING34 3 2 -42 -4 - 2 2
MENTAL ARITHMETIC33 2 - -3 -13 - - 2
DIVISIBILITY41 - -4 - -14 1 - 2
ESTIMATING SUMS44 - - -3313 - 2 -
ESTIMATING PRODUCTS44 2 - -44 -3 - - -
SIMPLEST FORM44 - -244 -4 - - -
SUBTRACTION (DECIMAL)44 - 14 -41 - - - -
LIQUID MEASURE23 3 24 - - -2 - 3 2
ENGLISH UNITS2 - - 1 -2222 - - -
INCH33 - - -3313 - - 3
KILOMETER -3 - -33314 - 4 3
SQUARE (AREA) -3 - 134 -13 - - 2
CAPACITY44 - 1 -432 - - 4 -
LINE44 - -34 - -4 1 - 3
LINE SEGMENT44 - -44 - -4 1 - -
EQUILATERAL TRI.44 - 14 - -14 - - -
ISOSCELES TRIANGLE44 - 14 - -14 - - -
SCALENE TRIANGLE44 - 14 - -14 - - -
RECTANGLE44 3 - -44 -4 - 4 3
RHOMBUS44 4 1 -4 - -4 - - -
SQUARE44 4 - -44 -4 - 3 -
EQUATION44 - 1 -4 -13 - - -
NUMBER SENTENCE43 - 123 -1 - - 4 -
WRITING NUMBERS3 - - 23 -3 - - 1 4 -
DISTRIBUTIVE (WHOLE)33 - -34 - -4 - - -
DIVISION BY TEN - - - -43 -13 1 - -
ESTIMATING QUOTIENTS44 - - -34 -3 - - -
GCF3 - - 12 -41 - - - -
MULT. PROPERTIES33 - -24 - -2 - 4 -
INEQUALITY (DECIMAL) - - - 12 -2 -2 2 - -
ROUNDING DECIMALS44 - 1 - -41 - - - -
WORD PROBLEM (DECIMAL)22 - 1 - -22 - - - -
PROTRACTOR - - - 1443 -4 - - -
DEGREE NOTATION3 - - -433 -4 - - -
FOOT33 - - -331 - - - 2
UNIT AREA2 - 2 - -2 -22 - - -
LENGTH34 3 1 - -3 - - - 3 3
PERIMETER44 - - -4 -14 - 3 -
VOLUME44 4 - - -31 - - 3 -
POINT43 - -34 - -4 - - -
PARALLELOGRAM44 4 - -4 - -4 - - -
TRAPEZOID44 - 1 -4 - -4 - - -
POLYGON44 4 1 - - -1 - - 4 -
NUMBER LINE -3 3 - -4 - -3 - 4 -
ADDEND (WHOLE)43 - 1 - - -1 - - - -
ARRAY (MULT.) (WHOLE)44 - - -34 - - - - 3
MULTIPLES OF TEN33 - 1 -3 - - - - 3 -
SYMBOLS FOR DIVSION3 - - 1 -3 -1 - - 3 2
SYMBOLS FOR MULTIPLICATION.3 - - 12 - -1 - - 3 2
INEQUALITY (FRACTION) -2 2 -2 - - - - 2 2 -
MULTIPLICATION (FRACTION) - - - - -4 -13 1 - -
EQUIVALENT DECIMAL -4 - 1 - - -14 - - -
ORDERING DECIMALS34 - - - -32 - - - -
THOUSANDTHS -3 - 14 - -1 - - - -
MEASUREMENT -3 3 13 - - - - - - 2
DECIMETER33 - - - - -13 - - -
MEASUREMENT (LENGTH3 - - -33 -1 - - - 4
PERIMETER (QUAD.) - - - 1 - -2 -2 2 - -
INTERSECTING LINES44 - - -4 - -4 - - -
NAMING AN ANGLE - - - -2 -4 -4 1 - -
STRAIGHT ANGLE - - - 14 -4 -4 - - -
VERTEX (ANGLE)4 - - -4 -4 -4 - - -
CIRCLE44 3 -3 - - - - - 3 3
SYMMETRY 3 4 3 1 - -3 - - - 4 -
SYMBOLS OF GROUPING2 - - 123 - - - - - -
AVERAGE44 - - - -41 - - - -
MEAN44 - - - -41 - - - -
MEDIAN44 - - - -41 - - - -
MODE44 - - - -41 - - - -
RANGE (STATISTICS)44 - - - -41 - - - -
SET - - - 1 - -31 - - 3 -
NUMERATION SYSTEM -1 4 - - - -2 - - - -
SIEVE (ERATOSTHENES11 - - - - - -1 - - -
ADD BY REGROUPING3 - - - -3 - -3 - 2 -
ASSOCIATIVE (ADD.)44 - - -4 - - - - - -
COMMUTATIVE (ADD.)44 - - -4 - - - - 2 -
IDENTITY (ADDITION)24 - - -4 - - - - - -
LCM - - - -4 -41 - - - -
MIXED OPERATIONS - - 3 2 - - -2 - - - -
MULT. COMBINATIONS -2 - 2 - - -2 - - 2 -
REPEATED SUBT. - - - - -3 -13 - - -
SYMBOLS FOR ADDITION - - - 13 - -1 - - - -
COMMON FRACTION - - 4 - -3 - - - 2 3 -
GCF (FRACTION) -4 - -24 - - - - - -
RENAMING (FRACTION) -3 - - - -3 -3 - - -
APPROXIMATION - - 2 2 -2 - - - - 4 2
MEASUREMENT (ANGLE) - - - 14 - - - - 1 - -
RULER3 - - 12 - - - - - 4 3
TEMPERATURE34 - - - - -1 - - - -
CENTIGRADE SCALE22 - - - - -2 - - - -
FAHRENHEIT SCALE44 - - - - -1 - - - -
TESSELLATION - - 3 1 - -4 - - - 4 -
HEXAGON -3 4 - - - -1 - - 4 -
PENTAGON -3 4 - - - -1 - - 4 -
DIAMETER44 - - - - -1 - - - -
RADIUS44 - - - - -1 - - - 3
CONE33 3 - - - - - - - 4 -
CUBE33 3 - - - - - - - 3 -
CYLINDER33 3 - - - - - - - 3 -
RECTANGULAR PRISM33 3 - - - - - - - 4 2
SPHERE43 3 - - - - - - - 3 -
REFLECTION14 - 1 - - - - - - - -
ROTATION -4 - 1 - -4 - - - - -
ORDER OF OPERATIONS3 - - 1 -4 - - - - - -
VARIABLE44 - - -4 - - - - - -
UNKNOWN - - - - -431 - - - -
BAR GRAPH34 - - - -3 - - - 3 -
LINE GRAPH44 - - - -4 - - - - -
PICTOGRAPH34 - -2 - - - - - 4 2
TABLES23 - - - -4 - - - 3 3
PROBABILITY44 - - - -4 - - - 3 -
VENN DIAGRAM (SET)1 - - - - - - -3 - - -
COUNTING - - 3 - - -3 - - - 3 3
EQUALITY - - - - -2 -2 - - 4 -
EVEN AND ODD NUMBER - - 3 1 - - - - - - 4 -
SEQUENCE - - - 1 - - -1 - - - -
ADD AND SUBTRACTION RELATION3 - - - - - -1 - - 4 -
DIVISION WITH DISTRIBUTION - - - - -3 - -3 - - -
DIVISION BY ZERO - - - - -4 -1 - - - -
IDENTITY (MULT.)24 - - - - - - - - - -
MULTIPLES OF FIVE23 - - - - - - - - 4 -
MULT. BY GROUPING - - - - -2 - -2 - 2 2
REPEATED ADDITION - - - - - -31 - - - -
THREE ADDENDS - - - 2 - - -2 - - - 2
NUMBER LINE (FRACTION)3 - - - - -3 - - - - -
PIE APPROACH - - - -2 - -1 - - 3 2
PROPER FRACTION - - - -4 - -1 - - - -
PROPERTIES (FRACTION) -4 - - - - - -3 - - -
EXPANDED FORM (DECIMAL) - - 3 - - -3 - - - - -
NUMBER LINE (INTEGER)33 - - - - - - - - - -
COMPARISON - - 2 1 - - - - - - - -
UNIT VOLUME2 - 2 - - - - - - - - -
PERIMETER (POLYGON) -4 - - - - -1 - - - -
AREA OF REGION - - - -43 - - - - - 2
DRAWING LINES - - - - - -3 - - 1 3 -
CONSTRUCTION (ANGLE - - - - -2 - - - 2 - -
SIDES OF AN ANGLE4 - - -3 - - - - - - -
CONSTRUCT TRIANGLES - - 4 -4 - - - - - - -
CONGRUENT POLYGONS22 - - - - - - - - - -
NAMING OF POLYGONS3 - - - - - -1 - - - -
EDGE (POLYHEDRON)44 - - - - - - - - - 3
FACE (POLYHEDRON)34 - - - - - - - - 4 3
NETS (POLYHEDRON)44 - - - - - - - - - -
PYRAMID -3 3 - - - - - - - 4 -
THREE DIMENSION -3 3 - - - - - - - 3 -
TRIANGULAR PRISM33 - - - - - - - - 4 -
VERTICES (SOLIDS)44 - - - - - - - - - -
FORMULA - - - - - -3 -4 - - -
INEQUALITIES4 - - 1 - - - - - - - -
TRUE AND FALSE - - - 24 - - - - - 4 -
WORD PROBLEMS (EQUATION)22 - - - - - - - - 2 -
FUNCTION34 - - - - - - - - - -
EQ. (2 VARIABLES)2 - - - -2 - - - - - -
COORDINATE44 - - - - - - - - - -
GRAPHING32 - - - - - - - - - -
LOCATING POINTS43 - - - - - - - - 2 -
ORDERED PAIR44 - - - - - - - - - -
CALCULATOR - - 3 - - - -1 - - - -
COLLECTING3 - - -4 - - - - - 4 2
DOUBLE BAR GRAPH43 - - - - - - - - - -
FREQUENCY TABLE - - - -2 -2 - - - 2 -
GRAPH33 - - - - - - - - - -
COMBINATION11 - - - - - - - - - -
IF THEN STATEMENT1 - - - - - - - - - - -
NUMBER AND NUMERAL - - - -4 - - - - - 2 -
ABACUS - - - -2 - - - - - - -
AFTER CONCEPT - - - - - - -1 - - - -
BEFORE CONCEPT - - - - - - -1 - - - -
BETWEENNESS - - - - - - -1 - - - -
COUNTING NUMBER - - - - - - - -3 - - -
ORDINAL NUMBER -4 - - - - - - - - - -
RENAME NUMBERS - - - - - - - -3 - - -
SQUARE NUMBER -4 - - - - - - - - - -
ADD BY NUMBER LINE - - - - - -4 - - - 4 -
COLUMN ADDITION - - - - - - -1 - - - -
DIVISION COMBINATIONS - - - - - - -2 - - 2 -
DIVISION WITH NUMBER LINE -3 - - - - - - - - - -
FACTOR TREE -1 - - - - - - - - - -
SUBT. (TWO PLACE) - - - - - - -2 - - - -
CONGRUENT PARTS (FRACTION) - - - - - - - -2 - - -
GREATER THAN (FRACTION) - - - - - - -2 - - - -
LCD (FRACTION) -2 - - - - - - - - - -
LCM (FRACTION) - - - - -4 - - - - - -
PERCENT -1 - - - - - - - - - -
RATIO - - - 1 - - - - - - 4 -
RECIPROCAL (FRACTION) - - 3 - - - - - - - - -
UNLIKE FRACTION - - - - - -3 - - - - -
ESTIMATION (DECIMAL3 - - - - - - - - - - -
MULTIPLICATION (DECIMAL) - - - - - - -1 - - - -
POWERS OF TEN - - - - - - -1 - - - -
PROPERTIES (DECIMAL) -4 - - - - - - - - - -
REPEATING DECIMAL - - 2 - - - - - - - - -
INTEGER4 - - - - - - - - - - -
NEGATIVE INTEGER3 - - - - - - - - - - -
NEGATIVE NUMBER -4 - - - - - - - - - -
OPPOSITIES (INTEGER)4 - - - - - - - - - - -
POSITIVE INTEGER3 - - - - - - - - - - -
POSITIVE NUMBER -4 - - - - - - - - 3 -
PI - - - - - - -1 - - - -
MAP INTERPRETATION - - - 1 - - - - - - 3 2
SHAPE - - - 1 - - - - - - 3 3
UNIT LENGTH - - - 1 - - - - - - 2 -
CIRCUMFERENCE - - - - - - -1 - - 2 -
APPROXIMATION (AREA - - - - - -2 - - - 4 2
ENGLISH UNITS (AREA - - - -2 - - - - - - -
METRIC UNITS (AREA) - - - -3 - - - - - - -
PARALLELOGRAM (AREA - - - - - - -1 - - - -
PRISM (AREA) - - 3 - - - - - - - - -
SQUARE CENTIMETER -3 - - - - - - - - - -
SURFACE AREA4 - - - - - - - - - - -
SPHERE (VOLUME) -3 - - - - - - - - - -
NAMING A POINT3 - - - - - - - - - - -
SET OF POINTS - - - - -3 - - - - - -
STRAIGHT LINE - - - -4 - - - - - 3 -
ADJACENT ANGLE - - - -4 - - - - - - -
COMPLEMENTARY ANGLE - - - -4 - - - - - - -
SUPPLEMENTARY ANGLE - - - -4 - - - - - - -
VERTICAL ANGLES - - - -4 - - - - - - -
BASE (TRIANGLE) - - - - - -3 - - - - -
SUM OF ANGLES - - - 1 - - - - - - - -
CONSTRUCTION (QUAD. - - 4 - - - - - - - - -
RECOGNITION OF - - - 2 - - - - - - - -
trapezium - - 4 - - - - - - - - -
CONVEX POLYGON - - 3 - - - - - - - - -
REGULAR POLYGON - - 3 - - - - - - - - -
SIMILAR FIGURE1 - - - - - - - - - - -
CURVE - - - -3 - - - - - 3 3
CENTER4 - - - - - - - - - - 3
CHORD -4 - - - - - - - - - -
ELLIPSE - - - 1 - - - - - - - -
SEMICIRCLE - - - 1 - - - - - - - -
PLANE - - - -4 - - - - - - -
BASE (POLYHEDRON) -4 - - - - - - - - 3 -
SOLID3 - - - - - - - - - - -
TETRAHEDRON - - 4 - - - - - - - - -
AXIS OF SYMMETRY - - - - - - - - - 1 4 -
TRANSLATION -4 - - - - - - - - - -
ADDITION PROPERTY - - - - - - -2 - - - -
ALGEBRAIC EXPRESS.4 - - - - - - - - - - -
COMMUTATIVE (EQ.)3 - - - - - - - - - - -
GRAPHING (EQUATION) -3 - - - - - - - - - -
MULT. PROPERTIES2 - - - - - - - - - - -
OPEN SENTENCE - - - -4 - - - - - 4 -
SOLUTION3 - - - - - - - - - - -
SUBSTITUTION - - - - - - -1 - - - -
FUNCTION MACHINE - - - - -2 - - - - 2 -
GRAPHS OF FUNCTIONS3 - - - - - - - - - - -
AXES3 - - - - - - - - - - -
DISTANCE - - - 1 - - - - - - - -
ORIGIN4 - - - - - - - - - - -
ESTIMATE - - 2 - - - - - - - 4 3
FLOW CHART - - 2 - - - - - - - 2 -
TABLE FORMAT3 - - - - - - - - - - -
STATISTICS - - - - - - -1 - - - -
CENTRAL TENDENCY - - - - - - -1 - - - -
INTERPRETATION3 - - - - - - - - - 3 -
ACCURACY - - - - - - - - - - 2 -
ADDITION COMBINATIONS (WHOLE) - - - - - - - - - - 2 -
APPLICATION2 - - - - - - - - - 2 2
AREA - - - - - - - - - - 3 2
CIRCLE GRAPH - - - - - - - - - - 2 2
COMPASS - - - - - - - - - - - 3
COMPOSITION - - - - - - - - - - 2 -
CONGRUENT TRIANGLES - - - - - - - - - - - 2
CONSTRUCTION - - - - - - - - - - 2 2
CONSTRUCTION (LINE) - - - - - - - - - - - 2
COORDINATE SYSTEM - - - - - - - - - - 2 -
EXPERIMENTAL PROB.3 - - - - - - - - - 2 -
PROBABILITY TREE2 - - - - - - - - - - -
ZERO PROBABILITY2 - - - - - - - - - - -
SEQUENCE - - - - -4 - - - - 4 2
EQUIVALENCE - - - - - - - - - - 3 -
FLOW DIAGRAM METHOD - - - - - - - - - - 4 -
MAGIC SQUARE - - - - - - - - - - - 2
MOTION PROBLEMS - - - - - - - - - - 2 -
MULTIPLES OF TWO - - - - - - - - - - 3 -
ONE HALF - - - - - - - - - - 4 4
PAPER FOLDING - - - - - - - - - - 3 -
PERSPECTIVE - - - - - - - - - - 2 -
PRISM - - - - - - - - - - 3 -
STANDARD UNIT - - - - - - - - - - 4 -
TRIANGLE NUMBERS - - - - - - - - - - 3 -
TRIANGULAR PRISM - - - - - - - - - - 4 -

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