K-12math.info

Most frequently used terms in 21st century (2002-2019) ninth grade (age 14) textbooks

Out of 1000 terms - 398 different terms were used in these ninth grade student materials
average 165 terms were used per textbook (text)


Series information

11. Houghton Mifflin
Textbook series
(2002) United States

12. McGraw-Hill/Glencoe
Textbook series
(2002)United States

13. OpenSTAX/CNX/Siyavula
Open Education Resourse
(2011) South Africa

14. CK-12
Open Education Resourse
(2012) United States

16. McGraw-Hill/Glencoe
Textbook series
(2013) United States

21. Ukuqonda Math
Textbook series
(2017) South Africa
NOTE: Online no longer available.

22. NCERT India (2019)



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 >>> Houghton
Mifflin
2002/text
USA 		McGraw-Hill
2002/text
USA 		OpenStax
2011/OER
South Africa
 		CK-12
2012/OER
USA
 		McGraw-Hill
2013/text
USA 		Ukuqonda Math
2017/text
South Africa
 NCERT
2019/text
India
ALGEBRAIC EXPRESS. 23 3 3443
BASE (EXPONENT) 33 3 4343
BINOMIAL 44 4 4444
COORDINATE SYSTEM 24 3 2434
EQUATION 44 4 4433
EXPONENT 34 3 4443
FACTOR (POLYNOMIAL) 33 3 4333
MONOMIAL 44 4 4444
NEGATIVE EXPONENT 44 3 4443
OPERATIONS (EXPON.) 43 4 4422
POLYNOMIAL 44 3 4434
REAL NUMBER 34 3 4344
TRINOMIAL 44 4 4444
AXES -4 3 4434
COORDINATE 33 3 4 -44
FACTORING POLY.33 -4424
GRAPHING EQUATION33 3 3 -44
GRAPHING QUADRATIC43 -4444
INTEGER 34 4 4 -44
IRRATIONAL NUMBER 44 4 4 -44
LOCATING POINTS GRAPHS23 3 3 -22
OPERATIONS ON POLY.33 4 343 -
ORDERED PAIR (PLANE)44 -4343
ORIGIN (PLANE) -4 4 4444
PARALLEL LINES (EQUATION)44 -4444
QUADRANT 34 4 4 -44
RADICAL SIGN 34 2 3 -24
RATIO 34 -4443
RATIONAL NUMBER 44 4 4 -44
SCATTER DIAGRAM 22 2 224 -
SCIENTIFIC NOTATION 44 4 444 -
SLOPE 44 2 442 -
SOLUTION 44 3 344 -
SUBSTITUTION 44 3 44 - 3
TRUE AND FALSE (EQ.) 33 -3333
VARIABLE -4 1 4444
WORD PROBLEMS (EQUATION)22 4 222 -
AVERAGE 44 3 - -33
COEFFICIENT (EQ.) 44 -344 -
COEFFICIENT (POLY.) 33 -43 - 4
CONSTANT (EQUATION)4 - 4 -443
DEGREE (POLYNOMIAL) 44 -44 - 4
DIFF. OF SQUARES -4 3 444 -
DISTRIBUTIVE 34 -444 -
EXPERIMENTAL PROB. 44 2 -4 - 4
FORMULA 44 -344 -
FREQUENCY TABLE -4 4 -144
FUNCTION 44 -444 -
HISTOGRAM -4 4 -344
HYPOTNUSE - - 3 4443
IDENTITY (EQ.) 44 - -444
INEQUALITIES 34 1 43 - -
LCD (RATIONAL EXP.) 44 3 44 - -
LINEAR EQUATION 44 -44 - 4
MEAN 44 4 - -44
MEDIAN 44 3 - -44
MODE 44 3 - -44
OPERATIONS (RATIONAL)34 3 43 - -
ORDER OF OPERATIONS 44 -442 -
ORDERED PAIR (EQ.)33 -3 -43
PERCENT 34 -444 -
PERPENDICULAR LINES -4 -4443
POWER (EXPONENT)34 3 44 - -
PROBABILITY 44 4 - -44
PROBLEM SOLVING (EQ.)14 2 4 -2 -
PROPORTION 34 -443 -
PYTHAGOREAN THEOREM -4 4 444 -
RIGHT TRIANGLE - - 2 3433
SET -3 3 343 -
SIMPLIFYING (RATIONAL)4 - 3 444 -
SQUARE ROOT 44 -434 -
STANDARD FORM (POLY)4 - 2 444 -
STANDARD FORM (EQ.)44 4 4 -4 -
SYMBOLS OF GROUPING (EQ.)43 -232 -
WHOLE NUMBER -4 3 3 -44
ADDITION PROPERTY (EQ.)24 -24 - -
AXIS OF SYMMETRY 44 -24 - -
BAR GRAPH 4 - 3 - -44
CARTESIAN SYSTEM - - 3 2 -42
CENTRAL TENDENCY 44 4 - - - 4
COLLECTING (STATISTICS) -3 4 - -44
COMPLETING (SQUARE) 44 -44 - -
CONVERSE STATEMENT -4 -33 - 3
DEPENDENT VARIABLE -4 -444 -
DIRECT VARIATION 44 -44 - -
DISCRIMINANT 41 -44 - -
DIVISION -4 -44 - 4
DOMAIN 33 -43 - -
EQ. (2 VARIABLES) 34 3 - - - 4
EQUIV. EQUATIONS 44 - -44 -
FACTOR 3 - 3 3 -3 -
GRAPHING (FUNCTION) 4 - -443 -
GRAPHING (GRAPHS) - - 3 2 -44
INDEPENDENT VAR. -4 -444 -
INTERCEPT 43 -4 -4 -
INTEREST -4 4 -34 -
INVERSE VARIATION 44 -44 - -
LINE GRAPH 44 2 - -3 -
MIXTURE PROBLEMS 34 -44 - -
MOTION PROBLEMS -4 -222 -
MULT. PROPERTIES 24 -24 - -
NATURAL NUMBER -4 3 - -44
NEGATIVE NUMBER 34 - -34 -
NOTATION (FUNCTION) 44 -44 - -
ORDERED PAIR (RELATION) 33 -24 - -
PARABOLA 44 -44 - -
PERFECT SQUARE 33 -44 - -
QUADRATIC EQUATION 44 -34 - -
QUADRATIC FORMULA 44 -44 - -
QUADRATIC FUNCTION 44 -34 - -
QUADRATIC POLYNOMIAL 3 - -4 -34
RADICAL 34 3 4 - - -
RANGE (FUNCTION) 43 -43 - -
RATIONAL EXPRESSION 14 -34 - -
RATIONAL FUNCTION 44 -44 - -
RECTANGLE (AREA) - - 4 3 -43
RELATION 44 -44 - -
SEQUENCE -1 -344 -
SIMPLEST FORM (EXP.) - - -3343
SIMPLIFYING (ALG. EXP.)34 3 -4 - -
SLOPE-INTERCEPT 44 -44 - -
SOLVING (INEQ.) 34 -44 - -
STATISTICS - - 4 -434
SUBSTITUTION 3 - 3 3 - - 3
SYSTEMS (EQUATIONS) 44 -44 - -
SYSTEMS (INEQUAL.) 44 -44 - -
WORD PROBLEM (PERCENT) -2 -222 -
WORD PROBLEMS (GRAPHS)2 - -22 - 2
ZERO AS AN EXPONENT 4 - 4 4 - - 3
ZEROS OF A POLYNOMI 3 - -22 - 4
ADDITION (INTEGER) -4 -2 -4 -
APPLICATION (PROBABILTY) - - 2 - -22
ASSOCIATIVE (EQ.) -4 - -44 -
COMBINING TERMS - - 2 3 -4 -
COMMUTATIVE (EQ.) -4 - -44 -
CONGRUENT TRIANGLES - - 4 - -44
CONSTRUCT TRIANGLES - - 2 - -34
CUBE ROOT - - -434 -
CYLINDER (AREA) - - 4 - -44
DEDUCTIVE REASONING 11 - -1 - -
DIAGONAL OF QUAD. - - 3 - -44
DISTANCE -4 -4 - - 3
DIVISION (INTEGER) -4 - -34 -
EQUIVALENT FRACTIONS - - -4 -43
EXPONENTIAL FORM - - 2 3 -3 -
EXPONENTIAL FUNCT. -4 -44 - -
FACTORS (QUADRATIC) 43 - -3 - -
GRAPHING (EQUATION) 4 - -43 - -
GRAPHING (INEQ.) -3 -44 - -
graphing (rational 13 - -3 - -
IF THEN STATEMENT 11 - -3 - -
INDUCTIVE REASONING 11 - -1 - -
LINEAR FUNCTION 3 - -34 - -
MATRIX 41 - -1 - -
METRIC UNITS - - 2 - -22
MULTIPLICATION (INTEGER) -4 - -34 -
NUMBER LINE (INTEGER) -4 -33 - -
NUMBER LINE (REAL) 33 - - - - 4
OPEN SENTENCE 44 - -4 - -
OPERATIONS (RADICAL -4 -44 - -
OPPOSITIES (INTEGER) -4 -3 -3 -
PARALLEL LINES - - 3 - -44
PARALLELOGRAM (AREA - - 4 - -44
PARALLELOGRAM - - 4 - -33
PERFECT SQUARE 44 -4 - - -
PERPENDICULAR LINES - - 3 - -43
POINT-SLOPE FORM 44 -4 - - -
POSITIVE INTEGER 3 - - -3 - 3
POSITIVE NUMBER 3 - - - -33
PRISM (VOLUME) - - 4 - -42
PROBABILITY TREE -2 3 - -2 -
PROPERTIES (RATIONAL) -3 -3 - - 3
PYTHAGOREAN TRIPLES - - 1 -44 -
QUADRILATERAL - - 4 - -34
RADICAND 43 - -3 - -
RANDOM SAMPLE - - 2 -34 -
RATIONALIZING -3 -4 - - 4
RECTANGLE - - 4 - -34
REFLECTION - - 4 -44 -
RHOMBUS - - 4 - -34
SIMILAR TRIANGLE 4 - 4 - -4 -
SOLUTION SET -2 - -4 - 2
SQUARE - - 4 - -34
STANDARD FORM - - -444 -
SUBTRACTION (INTEGER) -4 -2 -4 -
SURFACE AREA - - 4 - -43
TABLE FORMAT 3 - 2 3 - - -
THEOREM 4 - - - -44
THEORETICAL PROBAB. 34 - -4 - -
THREE DIMENSION - - 3 - -33
TRANSLATION - - 4 -42 -
TRAPEZIUM - - 4 - -34
TWO POINT FORM 4 - - -24 -
UNKNOWN -3 -3 -3 -
VERTEX (QUADRATIC) 44 -4 - - -
VOLUME - - 3 - -44
WORD PROBLEM (RATIO) -2 -22 - -
WORD PROBLEMS (QUAD.) 2 - -2 - - 2
WORK PROBLEMS -1 -43 - -
ZERO PROBABILITY 33 4 - - - -
ABSOLUTE VALUE -4 - -3 - -
ABSOLUTE VALUE (EQUATION) 4 - -4 - - -
ADDITION (RATIONAL) -3 -4 - - -
ADDITIVE INVERSE -4 - - -4 -
ALGEBRAIC FRACTION - - 2 - -4 -
AREA OF TRIANGLE - - 4 - - - 4
ASYMPTOTE 4 - - -4 - -
AXIOM 4 - - - - - 4
BRACE NOTATION (SET) -3 -3 - - -
CALCULATOR - - 3 3 - - -
CENTIMETER - - 3 - -3 -
CIRCLE (AREA) - - -3 -4 -
CIRCLE GRAPH -3 2 - - - -
COMBINATION -2 - -4 - -
COMPLEX NUMBER -4 - -3 - -
COMPOUND (INEQ.) -4 -4 - - -
COMPOUND INTEREST - - - -44 -
CONCAVE DOWN -2 -2 - - -
CONCAVE UP -2 -2 - - -
CONJUGATE 34 - - - - -
CORRESPONDING PARTS (GEO.) - - 3 - - - 3
CORRESPONDING PARTS (TRI.) - - 3 - - - 3
COSINE RATIO 4 - - -4 - -
COUNTER EXAMPLE 34 - - - - -
COUNTING NUMBER - - 3 3 - - -
CYLINDER - - 3 - -3 -
DENOMINATOR - - -3 -3 -
DEPENDENT EQUATIONS - - -44 - -
DISTRIBUTION - - - -4 - 3
DIVISION (RATIONAL) -4 -4 - - -
DOMAIN (RELATION) -4 - -4 - -
DOUBLE BAR GRAPH - - 2 - -4 -
EXTREMES AND MEANS 4 - - -4 - -
FACTOR (WHOLE) -3 - - -3 -
FACTOR TREE -3 -3 - - -
FAHRENHEIT SCALE - - 3 3 - - -
FRACTION - - -3 -3 -
FRACTIONAL EXPONENT - - -42 - -
FUNCTION MACHINE - - -3 -2 -
GCF (POLYNOMIAL) -4 -4 - - -
GCF (NUMBERS) -4 - - -2 -
GRAPH (STATISTICS) - - 3 - -4 -
GRAPHING RELATIONS -3 -2 - - -
GRAPHS OF FUNCTIONS - - - -34 -
HYPOTHESIS 11 - - - - -
IMPROPER FRACTION - - -4 -4 -
INCONSISTENT EQ. - - -44 - -
ISOSCELES TRIANGLE - - 3 - - - 4
KILOMETER - - 3 - -3 -
LCM (FRACTION) - - -3 -4 -
LENGTH - - 3 - -3 -
MULTIPLICATION (RATIONAL) -4 -4 - - -
MULTIPLICATIVE INVERSE -4 -4 - - -
NEGATIVE INTEGER 3 - - - - - 3
NETS (POLYHEDRON) - - 2 - -4 -
NON-LINEAR FUNCTION - - - -44 -
NUMERATOR - - -3 -3 -
ORDERING (RATIONAL) -3 -3 - - -
ORDINATE - - -4 - - 4
PENTAGON - - 4 - -3 -
PERCENT NOTATION -3 - - -4 -
PERMUTATION -1 - -4 - -
PIE APPROACH - - -2 -4 -
POLYGON - - 4 - -3 -
POLYHEDRON - - 3 - -4 -
POSTULATE 4 - - - - - 4
PRIME POLYNOMIAL 4 - - -4 - -
PRISM (AREA) - - 3 - - - 2
PROPERTIES (REAL) 3 - - - - - 3
PROPERTIES (EQUATIONS) - - -3 - - 2
RANGE (RELATION) -4 - -4 - -
RANGE (STATISTICS) -4 - - -4 -
RATE OF INTEREST -2 3 - - - -
RECIPROCAL -4 -4 - - -
RECTANGULAR PRISM - - 3 - -3 -
RELATION AND FUNCTION 3 - -4 - - -
REPEATING DECIMAL - - 3 - - - 2
RULE (FUNCTION) 2 - -3 - - -
SAMPLE SPACE -4 - - -2 -
SINE RATIO 4 - - -4 - -
SOLUTION SET -3 - - - - 2
SOLVE (ELIMINATION) -4 -4 - - -
SQUARE (AREA) - - 4 - -4 -
SUBTRACTION (RATIONAL) -3 -2 - - -
TANGENT RATIO 4 - - -4 - -
TERMINATING DECIMAL - - 3 - - - 4
TRANSLATION - - -3 -2 -
TRAPIZOID (AREA) - - -3 - - 2
TRIANGLE - - 3 -3 - -
TRIANGULAR PRISM - - 3 - -3 -
TRIGONOMETRY 4 - - -4 - -
WORD PROBLEM (RATIONAL NUM.) 2 - -2 - - -
ZEROS OF FUNCTION -4 -4 - - -
ABSCISSA - - -4 - - -
ACCURACY - - - -1 - -
ADDITION (REAL) 4 - - - - - -
ALTITUDE (TRIANGLE) - - 2 - - - -
APPLICATIONS (EXPONENT) - - -3 - - -
APPLICATIONS (FUNCTION) - - -2 - - -
APPROXIMATION - - -3 - - -
ARITHMETIC PROGRESSION - - -4 - - -
BASE (TRIANGLE) - - 3 - - - -
BROKEN LINE - - - -2 - -
CENTIGRADE SCALE - - -2 - - -
COMPLETE FACTORIZATION -2 - - - - -
COMPLEX FRACTION - - - -4 - -
COMPOSITE NUMBER -4 - - - - -
CONDITIONAL STATMENT -1 - - - - -
CONGRUENT POLYGONS - - 2 - - - -
DECIMETER - - 3 - - - -
DEFINITION - - 4 - - - -
DIFF. OF 2 SQUARES 3 - - - - - -
DIVISION (REAL NUMBER) 4 - - - - - -
DOMAIN - - - -3 - -
DOMAIN -3 - - - - -
ELEMENT (SET) - - - -4 - -
ENGLISH UNITS - - 2 - - - -
EQUATION OF A LINE - - 4 - - - -
EQUILATERAL TRIANGLE - - 4 - - - -
EQUIV. INEQUALITIES 4 - - - - - -
ESTIMATION (DECIMAL) - - 3 - - - -
EVEN POWER - - -3 - - -
EXTRANEOUS ROOTS - - -4 - - -
FACTORIAL - - - -4 - -
FACTORIAL NOTATION - - - -4 - -
FLOW CHART - - 2 - - - -
FLOW DIAGRAM METHOD 3 - - - - - -
FORMULA (COMB.) - - - -4 - -
FORMULA (PERM.) - - - -4 - -
FRACTIONAL EQUATION - - -2 - - -
GEOMETRIC PROGRESSION - - -2 - - -
GEOMETRIC SERIES - - - -2 - -
GOLDBACH CONJECTURE 4 - - - - - -
GREATER THAN (FRACTION) - - -3 - - -
HALF PLANE - - -3 - - -
HISTORICAL DEVEL. - - 2 - - - -
HYPERBOLA 4 - - - - - -
HYPOTNUSE (TRIG.) 3 - - - - - -
IMAGINARY SOLUTIONS - - -3 - - -
INDEPENDENT EQ. - - - -4 - -
INDIRECT PROOF 4 - - - - - -
INEQUALITY (INTEGER) - - -2 - - -
INTERPRETATION - - 2 - - - -
INVERSE FUNCTION - - - -2 - -
JOINT VARIATION - - -4 - - -
LCD (FRACTION) - - -4 - - -
LEADING MONOMIAL - - -2 - - -
MAPPING (FUNCTION) -3 - - - - -
MIDPOINT - - -4 - - -
MONEY - - 4 - - - -
MULTPLICATION (REAL) 4 - - - - - -
NAMING OF POLYGONS - - 3 - - - -
NEGATIVE RATIONAL NUM. -2 - - - - -
NORMAL DISTRIBUTION - - - -1 - -
N-TH ROOT - - - -3 - -
NUMBER LINE (FRACTION) - - -4 - - -
NUMBER LINE (RATIONAL) -3 - - - - -
NUMBER PHRASE -2 - - - - -
OPPOSITIES (REAL) 4 - - - - - -
PERIMETER (QUAD.) - - -2 - - -
PERSPECTIVE - - 3 - - - -
PLANE - - -3 - - -
POLYNOMIAL FUNCTION - - -3 - - -
PRIME NUMBER -4 - - - - -
PRINCIPAL -3 - - - - -
PROPER FRACTION - - -4 - - -
PROTRACTOR - - 3 - - - -
QUADRATIC INEQ. 4 - - - - - -
RANGE -3 - - - - -
RECIPROCAL (REAL) 4 - - - - - -
REGULAR POLYGON - - 4 - - - -
REGULAR POLYHEDRON - - 4 - - - -
RIGHT PRISM - - 3 - - - -
ROTATION - - 4 - - - -
ROUNDING - - -3 - - -
ROUNDING DECIMALS - - 3 - - - -
SCALE DRAWING -4 - - - - -
SIGNIFICANT FIGURES - - -4 - - -
SIMILAR POLYGONS - - 3 - - - -
SIMPLIFICATION - - -3 - - -
SIMULTANEOUS EQ. - - 3 - - - -
SOLVING POLYNOMIALS - - -4 - - -
SQUARE NUMBER -1 - - - - -
STANDARD DEVIATION - - - -4 - -
SUBSET -3 - - - - -
SUBTRACTION (REAL) 4 - - - - - -
SUM OF ANGLES - - 2 - - - -
SYMMETRY - - 3 - - - -
THREE VARIABLES 3 - - - - - -
TIME - - 3 - - - -
TRANSFORMATION - - - -4 - -
TRIANGLE NUMBERS -1 - - - - -
UNARY OPERATION 4 - - - - - -
VENN DIAGRAM (SET) -3 - - - - -
VOLUME FORMULAS - - 2 - - - -
WORD PROBLEM (FUNCTION)2 - - - - - -
Y-FORM 2 - - - - - -
ZERO PRODUCT THEOREM -2 - - - - -

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