Elementary Math grades K5 resources:
**K5 Math Teaching Resources**
Great site with printable activities matched to each of the K5 Common Core State Standards for Math  check back frequently they continually add new activities aligned to each standard:
http://www.k5mathteachingresources.com/
Kendall Hunt Illustrative Math K5 Curriculum
Great site with printable activities matched to each of the K5 Common Core State Standards for Math  check back frequently they continually add new activities aligned to each standard:
http://www.k5mathteachingresources.com/
Kendall Hunt Illustrative Math K5 Curriculum
fawnnguyen.com Finding Ways
is where I tell stories that are mainly about teaching and learning mathematics in the classroom. @fawnpnguyen
Marilyn Burns resourcesMarilyn Burns resources:
K5 Lessons Math Reasoning Inventory (MRI) is an online formative assessment tool designed to make teachers’ classroom instruction more effective. https://www.mathreasoninginventory.com/ Math Talks from Marilyn BurnsLink to Lesson Starters pdf
Math Talk in Action– Author Sherry Parrish on Number Talks Video 2:26 Math Talk in Action–Teacher Testimonials Video 2:24 Math Talk in Action–1st Grader Video 3:20 Math Talk in Action–5th Grader Video 1:46 MATH GAMES presentation fluency to reasoning
full page versions of math games array cards and games 4 Win Win Math games  article from Marilyn Burns NC 5th grade math games NC 4th_grade_nc_games.zip NC 3rd Grade math games online math games: http://www.softschools.com/math/games/ http://www.hoodamath.com/games/ https://www.brainpop.com/games/gamefinder/?subject=Math http://www.ictgames.com/placeValue.htm Free: help kids master basic math facts: www.xtramath.org Mastering Early Number SenseThis resource has 20 dot card activities, 8 fiveframe activities, and 14 tenframe activities, readytouse. Also, it includes dot card, fiveframe and tenframe templates, as well as other number representations. Click on the title or the picture on the left to download the packet.
Elementary Formative Assessment LessonsThis links you to the K5 Formative Assessment Lessons written by KDE Regional Math Content Specialists.
KPREP Released Items 
Dr Jo Boaler is a Professor of Mathematics Education at Stanford University, and the faculty director of youcubed. She is the author of nine books – including the best seller: Mathematical Mindsets  and she has received numerous awards for mathematics equity and leadership.
Growth Mindset TASKS Posters FluencyWithoutFear Visual Math The name “Open Middle” might sound like a strange name for a website about math problems. However, it references a very specific type of problem we try to encourage here. Most of the problems on this site have:
a “closed beginning” meaning that they all start with the same initial problem. a “closed end” meaning that they all end with the same answer. an “open middle” meaning that there are multiple ways to approach and ultimately solve the problem. Illustrative Mathematics TasksIllustrative Mathematics provides guidance to states, assessment consortia, testing companies, and curriculum developers by illustrating the range and types of mathematical work that students experience in a faithful implementation of the Common Core State Standards, and by publishing other tools that support implementation of the standards.
Robert Kaplinsky  Problem Based LessonsGraham Fletcher's website of elementary 3act math tasks:
https://gfletchy.com/3actlessons/ and a google doc of the tasks: https://docs.google.com/spreadsheets/d/1hc1ReIbdJZbEA3fO6DE457wu4AKOfi6BFxWLRBXObA/edit#gid=0 Multiplication Array Cards Rational Number Project(complete research based lessons & units for teaching fractions – homework & assessments at the end of this 467page document) YummyMathWe provide teachers and students with mathematics relevant to our world today …
We’ve created Yummy Math to provide teachers with an easy way to bring reallife into their math classrooms. It is our belief that when math is explored in contexts that are familiar and of interest to students, students will be more engaged to do math, reason, think critically, question and communicate. http://www.yummymath.com/birdseyeofactivities/ 
Resources by grade from multiple states...
Sample test questions NYC Dept of Education
K2 Math Units from Georgia

Mathematics Lessons or Units Grades K5
EQuIP Rubric for Lessons & Units: Mathematics (PDF) EQuIP Rubric for Lessons & Units: Mathematics Response Form (PDF) Grade K  Composing and Decomposing Shapes  Exemplar
Grade 2  Sums and Differences to 20  Exemplar
Grade 4  TwoDigit Array Multiplication  Exemplar 
35 Math Units from GeorgiaThird Grade Georgia Units
MAP Practice for Mathpractice for students on the MAP (Measures of Academic Progress) assessment 
Look for math category and RIT Range for practice sites For more information about MAP see: NWEA site Problem Solving Strategiesonline sample problem solving problems matched to different strategies with solution steps outlined
>>Check this video out for great idea for teaching MONEY with blocks>>Check this video out for teaching ELAPSED TIME or this one: using a numberline for addition/subtraction or money 
Building Number Sense and Fluencypowerpoint presentation with activities to build number sense and fluency with elementary mathematics activity thanks to Kentucky Center for Mathematics Regional Coordinator Becky Reister
Kentucky Center for MathematicsMath tools, resources, interventions, professional development, including the Kentucky Numeracy Project materials, etc. Kentucky Numeracy Project
Searchable site math numeracy resources. HandsOn EquationsDemystifying the Learning of Algebra: Making Algebra Child's Play
HandsOn Equations is a supplementary program that can be used with any math curriculum to provide students with a solid foundation for success with algebra. It uses the visual and kinesthetic approach developed by Dr. Henry Borenson to demystify the abstract algebraic concepts. article about HandsOn Equations here Measurement Olympics from AIMS

Math Live has animated lessons for students explaining math procedures using manipulatives
ERROR PATTERNS IN COMPUTATION

WHOLE Number OperationsWhole Number Operations Videos for you from youtube: Partial Sums with Base10 blocks: http://youtu.be/AcKTlLEPme4 Partial Sums Addition and Trade First Subtraction: http://youtu.be/fYUeyjxCY4 Left to Right Subtraction Method: http://youtu.be/x5Y87SpPClQ Lattice multiplication: http://youtu.be/cijuPxHgZAA Why Lattice multiplication works: http://youtu.be/S3z4XqC_YSc Partial products multiplication: http://youtu.be/leykN5g6kj8 Partial products area model with base 10 blocks: http://youtu.be/mjYYbwuued0 Partial products area model matrix – kid lead: http://youtu.be/g1ZkgHa5XN4 Partial Quotients Division: http://youtu.be/gLrM1jBsSHo Partial quotients division: http://youtu.be/Nvn3pUdyr_g Partial quotients division: http://youtu.be/HXdOW3GTth4 
FRACTIONS!Fraction Operations Videos for you to study from youtube: Adding fractions with unlike denominators with visuals: http://www.youtube.com/watch?v=UnMOM_kMbQ&feature=related Teaching adding & subtracting fractions With Cuisinaire Rods: http://www.youtube.com/watch?v=0BSvSGIWvMs&feature=relmfu Brownie Pan Model for Multiplying Fractions: http://www.youtube.com/watch?v=NBFS3KW_aIY&feature=related Division of Fractions (Visual Method): http://www.youtube.com/watch?v=xW1HZMe6bqQ 