Lawrence Hall of Science
The Math Page: Skill in Arithmetic: Elementary Addition
This resource offers six brief arithmetic lessons: sums less than ten, sums of ten, and sums between ten and twenty, doubling, zero, and a set of general practice problems.
Lawrence Hall of Science
The Math Page: Skill in Arithmetic: The Meaning of Subtraction, and Mental Calculation
This website explains and defines basic subtraction. There are practice problems at the very end of this lesson.
National Council of Teachers of Mathematics
Nctm: Figure This: How Much Time Do Teens Spend on the Job?
Try this math challenge where you investigate the average number of hours teen actually spend working. Apply your problem solving, number sense, and computation skills in this one page activity from the NCTM Math Challenges for Families...
Teaching Treasures Publications
Teaching Treasures: Year Two Math (Page 1)
Improve your computation skills using this interactive worksheet. Review two digit addition and subtraction facts. This worksheet gives students immediate feedback and is a suitable tool for short assessments or independent practice.
Scholastic
Scholastic: Math Maven's Mysteries: The Case of the Hatcher Hotel Heist
Help Math Maven solve this mystery! Items are missing from several hotel rooms, but some addition and subtraction clues have been left behind. Use your skills to figure out where the thief will strike next!
Google
Google for Education: Data Aggregation and Decomposition (Excel)
By using Microsoft Excel, students collect, decompose, and re-aggregate class data. Students use computational thinking skills by decomposing long lists of information and writing basic algorithms to help analyze data.
ABCya
Ab Cya: Addition With Manipulatives
An interactive addition game that includes movable manipulatives. An engaging tool for building skills with one and two digit addition facts. Immediate feedback given.
Quia
Quia: Story Problems With Mixed Practice
Your problem-solving skills are put to the test in this interactive word problem game on this site. Employ a variety of mathematical skills and strategies including logical reasoning and computation. Multiple choice problems created for...
Learning Wave Communications
Learning Wave: Decimals
This resource contains several links that lead to discussions on several topics of decimals, including converting and comparing with fractions, rounding, estimating, and basic operations. Each page includes examples and some sample...
Math Slice
Math Slice: Math Crossword Slice Special Test
Use this interactive math crossword puzzle to build number sense skills. Simply fill in the missing numbers based on the operation. Immediate feedback given to responses.
PBS
Pbs Kids Design Squad: Take a Look
See how a new mobile phone technology is helping people receive basic eye exams.
Curated OER
Google for Education: Presentations on Cs and Technology for Young Children
Teach young children the basics of computer science and computational thinking skills through this collection of ready to use presentations aimed to engage young learners.
NumberNut
Number Nut: Multiplication Overview
Understand the basics of multiplication from this brief overview that contains related vocabulary, symbols, and examples of this operation. Students can practice this skill using the single-digit multiplication games. Both games are...
NumberNut
Number Nut: Carrying Like Addition
Use what you already know about addition to master this skill in multiplication. This lesson reviews the concept of carrying in multiplication. Detailed examples are provided along with interactive games to practice the skills learned....
NumberNut
Number Nut: More Than Two Addends
Develop strategies for adding more than two addends with this quick addition lesson. Examine how grouping numbers can help make adding multiple numbers easier. Then, practice your new skills using the related interactive games that are...
NumberNut
Number Nut: Multiplying More Than Two Factors
Multiplying by more than one factor can be easy when you break the numbers down. Learn this problem solving strategy and others in this short lesson that demonstrates how to multiply with several factors. This lesson includes specific...
Math Slice
Math Slice: Number Sense Math Drills
A group of topics that include counting with pictures to 20, sums to 100, finding the missing number in a sequence, multiplication, expanded and standard form, and basic computation practice with addition, subtraction, multiplication, or...
Other
Project Happy Child: Free Addition Worksheets
2000 basic addition worksheets are available at this web site. They can be printed and used for a variety of practice purposes. Some helpful hints are included to avoid mindless practice that could quickly become counter productive.
University of Cambridge
University of Cambridge: Nrich: Sealed Solution
On this one page website sharpen your logic and addition facts skills while working on this challenge. The solution is available to double check your solution.
University of Cambridge
University of Cambridge: Nrich: Game Criss Cross Quiz
Use this online game to improve your subtraction or addition skills while you play on a coordinate plane gameboard. Gain skills in two areas at the same time! This game can also be altered to practice multiplication facts. There is a...
University of Cambridge
University of Cambridge: Nrich: Game Pass the Peas, Please
Use this game to improve your subtraction or addition skills. Gain skills in two areas at the same time! There is a "Get Printable Page," link at the top to print out materials you need. This game can also be altered to practice...
AAA Math
Aaa Math: Adding Two Digit Numbers
This lesson has an explanation for adding two-digit numbers using paper and pencil. There is also a game to practice your skills. The game gives you a percent score of your correct answers, as well as running totals of your correct and...
AAA Math
Aaa Math: Adding Three Digit Numbers
Read through this explanation of how to add three digit numbers. Use the online game to practice this skill. The game will keep running totals of your correct and incorrect answers. It will also show you a percent score of the correct...
University of Cambridge
University of Cambridge: Nrich: One Big Triangle
On this one page website sharpen your logic and addition facts skills while working on this challenge. The solution is available to double check your solution.