pure mathematics, algebra, calculus and analysis, geometry and topology, combinatorics, logic, number theory, applied mathematics, dynamical systems and differential equations, mathematical physics, computation, information theory and signal processing,  probability and statistics, game

Research Foundation Mathematics - Teaching Strategies
https://teachingstrategies.com/wp-content/uploads/2017/03/Research-Foundation-Math.pdf

theory, operations research, acute angle, acute triangle, additive inverse, adjacent angles, angle, arc, area, average, binomial, bisect, canceling, cartesian coordinates, chord, circle, circumference, coefficient, common denominator, complementary angles, complex fraction, congruent,

Research on teaching mathematics: The unsolved problem of teachers' mathematical knowledge
http://www.academia.edu/download/30561596/balllubienskimewbornchapter.pdf
coordinate graph, cube, cube root, decimal fraction, degree, denominator, diameter, difference, equation, equilateral triangle, even number, expanded notation, exponent, exterior angle, factor, F.O.I.L. method, fraction, greatest common factor, hypotenuse, imaginary number, improper

A research-based curriculum: The research basis of the UCSMP Everyday Mathematics Curriculum
https://www.researchgate.net/profile/Andrew_Isaacs/publication/238741991_A_Research-Based_Curriculum_The_Research_Basis_of_the_UCSMP_Everyday_Mathematics_Curriculum/links/5728a83508aef7c7e2c0bc4d.pdf
fraction, integer, interior angles, intersecting lines, interval, irrational number, isosceles triangle, least common multiple, linear equation, lowest common denominator, mean, median, mixed number, monomial, natural number, negative number, nonlinear equation, number line, numerator,

Research on affect in mathematics education: A reconceptualization
http://www.peterliljedahl.com/wp-content/uploads/Affect-McLeod.pdf

obtuse angle, obtuse triangle, odd number, ordered pair, origin, parallel lines, percentage, perpendicular lines, Pi, polynomial, positive number, power, prime number, proper fraction, proportion, Pythagorean theorem, quadrants, quadratic equation, radical sign, radius, ratio, rational number,

The rise and fall of probability in the k–8 mathematics curriculum in the United States
http://iase-web.org/documents/papers/icme13/ICME13_I5_Langrall.pdf

reciprocal, reducing, right angle, right triangle, scalene triangle, scientific notation, set, simplify, solution, solution set, square, square root,
straight angle, straight line, supplementary angles, term, transversal, triangle, trinomial, unknown, variable, vertical angles, volume, whole number, X-axis, X-coordinate, Y-axis, Y-coordinate,

THE HIDDEN CURRICULUM IN HIGHER EDUCATION MATHEMATICS MODELING TEXTBOOKS
http://www.rcml-math.org/assets/Proceedings/rcml%20proceedings%202017.pdf#page=143

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EARLY GRADE MATHEMATICS ASSESSMENT–SPATIAL REASONING

AND RELATIONAL REASONING SUBTASKS
http://www.rcml-math.org/assets/Proceedings/rcml%20proceedings%202017.pdf#page=95

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Examining Social and Sociomathematical Norms in Different Classroom Microcultures:

Mathematics Teacher Education Perspective
https://www.estp.com.tr/wp-content/uploads/2016/12/ESTP-2017-0383.pdf

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Utilizing Lesson Study in Improving Year 12 Students' Learning and Performance in Mathematics
https://www.researchgate.net/profile/Masitah_Shahrill/publication/313745556_Utilizing_Lesson_Study_in_Improving_Year_12_Students'_Learning_and_Performance_in_Mathematics/links/58a48184a6fdcc0e07590a2d/Utilizing-Lesson-Study-in-Improving-Year-12-Students-Learning-and-Performance-in-Mathematics.pdf

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Math Success for STEM Majors: Active Learning Strategies and Engineering Contexts
http://zone2.asee.org/sessions/program/3/119.pdf

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Interventions to improve mathematics achievement in primary school-aged children: a systematic review
https://www.campbellcollaboration.org/media/k2/attachments/ECG_Simms_Title.pdf

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Forming Positive Identities to Enhance Mathematics Learning among Adolescents.
http://www.hrpub.org/download/20170130/UJER1-19506877.pdf