Vocabulary list for 3rd grade    from the Everyday Math Lesson Guide      Unit #1 vocabulary for third grade from EDM Lesson 1.1 museum unit Lesson 1.2 number grid number grid puzzle odometer Lesson 1.3 table of  contents essay answer key glossary index definition data bank Lesson 1.4 tool kit Lesson 1.5 tally chart range mode maximum minimum Lesson 1.6 name collection box Lesson 1.7 difference Lesson 1.8 repeat key Lesson 1.9 decimal point decimal make change Lesson 1.10 sale price regular price estimate estimation calculate Lesson 1.11 frames and arrow diagram frame arrow rule Lesson 1.12 elapsed time Unit #2 vocabulary for third grade from EDM Lesson 2.1 unit box label measurement unit fact family turn-around rule number family Lesson 2.2 fact extension teacher: higher decade facts complement Lesson 2.3 function machine input output rule What’s My Rule? Lesson 2.4 parts-and-total number story parts-and-total diagram number model Lesson 2.5 change diagram change-to-more number story change-to-less number story deposit withdraw teacher: trade first algorithm Lesson 2.6 comparison number story comparison diagram compare Lesson 2.7 ballpark estimate partial sums method Lesson 2.8 trade first method Lesson 2.9 addend Unit #3 vocabulary for third grade from EDM Lesson 3.1 standard unit length Lesson 3.2 inch, in. line segment centimeter, cm millimeter, mm Lesson 3.3 U.S. customary system metric system foot yard personal references milli- centi- meter decimeter Lesson 3.4 triangle square rhombus rectangle parallelogram trapezoid perimeter polygon girth (optional) Lesson 3.5 tiling area Lesson 3.6 area square foot square yard Lesson 3.8 circumference diameter center “about three times” circle rule Unit #4 vocabulary for third grade from EDM Lesson 4.1 multiplication / division diagram multiplication multiples of equal groups Lesson 4.2 array factor product Lesson 4.4 quotient dividend divisor remainder Lesson 4.5 factor product fact power turn-around shortcut square numbers Lesson 4.6 Multiplication / Division fact triangle Lesson 4.9 map scale “as the crow flies” scale factor Unit #5 vocabulary for third grade from EDM Lesson 5.1 ones tens hundreds thousands ten thousands Lesson 5.2 maximum median > is greater than <  is less than Lesson 5.3 hundred-thousand million Lesson 5.4 population census Lesson 5.5 pie graph Lesson 5.6 cube long flat big cube Lesson 5.7 tenths hundredths Lesson 5.9 decimeter Lesson 5.10 thousandths precipitation millimeter Lesson 5.12 line graph Unit #6 vocabulary for third grade from EDM Lesson 6.1 line segment endpoint A B ray arrowhead  A B line  A B Teacher: diagonal of a polygon Lesson 6.2 parallel intersect angle Lesson 6.3 clockwise full turn half-turn quarter-turn angle vertex ( of an angle ) side ( of an angle ) clockwise ( right turn ) counterclockwise ( left turn ) right angle Lesson 6.4 triangle side ( of an angle ) vertex of a triangle ( vertices ) angle ( of a triangle ) equilateral triangle right triangle Lesson 6.5 quadrangle square rhombus parallelogram rectangle trapezoid adjacent sides kite Lesson 6.6 polygon regular polygon Lesson 6.7 rotation vertical Lesson 6.8 degree Lesson 6.9 symmetric symmetry mirror image line of symmetry Lesson 6.10 congruent Lesson 6.11 3-dimensional ( 3-D ) 2-dimensional ( 2-D ) cone cylinder sphere pyramid prism polyhedron face edge vertex ( plural: vertices ) base of a pyramid parallel bases of a prism Lesson 6.12 rectangular prism triangular prism hexagonal prism Unit #7 vocabulary for third grade from EDM Lesson 7.1 square product square number factor product Lesson 7.4 parentheses Lesson 7.6 extended fact Lesson 7.7 estimate Lesson 7.8 range Lesson 7.9 similar figures Lesson 7.10 Unit #8 vocabulary for third grade from EDM Lesson 8.1 whole ( the ONE ) denominator numerator Lesson 8.4 equivalent fractions Lesson 8.6 mixed number Unit #9 vocabulary for third grade from EDM Lesson 9.4 algorithm partial-products algorithm Lesson 9.6 factor Lesson 9.10 equilateral triangle Lesson 9.13 Fahrenheit scale degrees Fahrenheit Celsius scale degrees Celsius Unit #10 vocabulary for third grade from EDM Lesson 10.2 height of a prism volume cubic centimeter ( cu cm,cm3 ) square centimeter ( sq cm, cm2 ) square inches ( sq in., in.2 ) Lesson 10.4 weight capacity of a scale precision Lesson 10.6 capacity ( of a container ) Lesson 10.7 mean average median Lesson 10.8 median mean average Lesson 10.9 memory memory keys Lesson 10.10 frequency table mode Lesson 10.11 coordinate grid coordinate plotting the point ordered pair Unit #11 vocabulary for third grade from EDM Lesson 11.1 event Lesson 11.3 heads tails fair equally likely Lesson 11.6 random draw Lesson 11.8 winter solstice summer solstice autumnal equinox vernal equinox