Math Glossary – A Great Student Resource!

This 38 page math glossary has been designed for 3rd-5th grades and includes 129 math terms with definitions and 72 illustrations! Terms include those surrounding basic operations, geometry and elementary statistics.


  1. < and >
  2. 12-hour and 24-hour clock
  3. 2D shapes
  4. 3D shapes
  5. acute angle
  6. analog and digital clocks
  7. area
  8. array
  9. ascending order
  10. associative property
  11. average
  12. axis
  13. bar chart
  14. bar model
  15. block graph
  16. BODMAS
  17. bridging through 10
  18. bus stop method
  19. capacity
  20. cardinal numbers
  21. Carroll diagram
  22. chunking
  23. circle
  24. circumference
  25. clockwise and counterclockwise
  26. coordinates
  27. column method
  28. commutative property
  29. complementary addition
  30. converting into same units
  31. cube numbers
  32. data handling
  33. decimal
  34. degrees
  35. denominator
  36. descending order
  37. diagonal
  38. diameter
  39. distributive property
  40. division facts
  41. edge
  42. equation
  43. equilateral triangle
  44. equivalent fractions and simplifying fractions
  45. estimate
  46. expanded notation
  47. face
  48. factor
  49. finding the difference between two numbers
  50. formula
  51. greatest common factor
  52. grid method horizontal improper fraction
  53. integer
  54. inverse operation
  55. isosceles triangle
  56. least common denominator
  57. least common multiple
  58. line graph
  59. long division
  60. long multiplication
  61. mass
  62. means
  63. median
  64. mirror line
  65. mixed number
  66. mode
  67. multiple
  68. negative numbers
  69. net
  70. number bonds
  71. number facts
  72. number line and number ladder
  73. number sentence
  74. number square
  75. numerator
  76. obtuse angle
  77. odd and even numbers
  78. operation
  79. ordinal numbers
  80. parallel
  81. partitioning
  82. percentage
  83. perimeter
  84. perpendicular
  85. pictogram
  86. pie chart
  87. place value
  88. polygon
  89. prime number
  90. prism
  91. probability
  92. product
  93. proportion
  94. pyramid
  95. quadrilateral
  96. radius
  97. range
  98. ratio
  99. reflection of shapes
  100. reflective symmetry
  101. reflex angle
  102. regular and irregular shapes
  103. right angle
  104. right-angled triangle
  105. roman numeral
  106. rotation of shapes
  107. rotational symmetry
  108. rounding numbers
  109. repeated addition
  110. scale factor
  111. scalene triangle
  112. square numbers
  113. standard and non-standard units
  114. sum
  115. symmetry
  116. tally chart
  117. tessellation
  118. time intervals
  119. translation of shapes
  120. triangle
  121. triangular numbers
  122. turns
  123. two-step and multi-step problems
  124. unit fractions
  125. Venn diagram
  126. vertex / vertices
  127. vertical
  128. volume
  129. word problem or story problem

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3rd Grade, Math, Math Skills Review

March Math Workbook | 3rd Grade

Looking for fun 3rd grade Math worksheets to help students practice important skills? Check out My Teaching Library’s March Math Workbook for 3rd grade! This workbook includes 20 worksheets with a fun, shamrock theme that students will love.

Skills covered include:

  • 4 – 6 digit ordering least to greatest
  • rounding to the nearest ten, hundred, thousand
  • graphing
  • addition
  • subtraction
  • multiplication
  • division
  • geometry (area)
  • measurement (quantity)
  • telling time

Here are additional 3rd grade resources you’ll love:


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2nd Grade, 3rd Grade, Math, Roman Numerals, Uncategorized

Learning about Roman Numerals and a FREE worksheet!

Roman Numerals & How They Began

Historians believe Roman Numerals began as a tally system. Shepherds on the hills and in the fields around Rome would cut marks into sticks to keep track of how many sheep or goats were in their care.

Each animal was counted then recorded on a wooden stick with a single notch cut with a knife. Every fifth sheep was recorded on the stick with two notches which formed a V.  Each tenth sheep was recorded with two cuts to form an X. This method of record keeping was still being used by Italian shepherds during the Nineteenth Century!

How to Write Roman Numerals

I = 1
V = 5
X = 10
L = 50
C = 100
D = 500
M = 1000

The mnemonic ‘I Value Xylophones Like Cows Do Milk’ may really help you. If you’d like a poster and/or flash cards, you can get them on My Teaching Library…

How to Read & Write Roman Numerals – The Additive Property

The Additive Property – This rather ‘techo’ term simply means to ADD the value of each symbol to arrive at the final number .
e.g. LXXXIII = 50 + 10 + 10 +10 + 1 + 1 + 1 = 83

Roman Numeral Rules:
When writing roman numerals NEVER use more than 3 of any symbol.
– When smaller numerals are on the right hand side of bigger ones ADD them to the larger.
– Putting a numeral of lesser value before a numeral of greater value decreases the second numeral by the amount of the first. Thus IV equals four because V (five) is decreased by I (one).
– Putting a numeral of lesser value after a numeral of greater value increases the first numeral by the amount of the second. Thus VI equals six because V (five) is increased by I (one).

Fun Lapbook Project to learn Roman Numerals

Students will learn both the history and math of roman numerals as they create a lasting project. Students are given informational text (a brief history) of this numerical system as well as an explanation of the numbers and how they are used (counted – will require students to ‘identify’ given numbers – i.e. CDLX). Students will also learn how roman numerals are used now in every day life.


  • – Explanation and instructions for creating a lapbook
  • – Informational text
  • – Map of Ancient Roman Empire
  • – Lapbooking templates

My Teaching Library is also offering a FREE worksheet to get students working with Roman Numerals 1 to 99. This FREE Roman Numerals Worksheet has been taken from MTL’s Roman Numerals 1 to 99 and Thanksgiving Mazes product. It will give your students practice converting Roman numerals to numbers (1 to 99). There are 12 problems and a fun cornucopia maze. Answer Key included!

Get your instant free Roman Numerals Worksheet here!

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