Place value, even and odd numbers, Roman numerals, large numbers, and rounding: games and resources online
E-manipulatives, including base 10 blocks
Use the stamp to place 100-flats, 10-rods, and 1-squares into a working space. Use the arrows in the columns to "move" (regroup) them to the other columns.
Virtual Manipulative: Base 10 blocks
Place value up to thousands. The program gives you a number to make and you click on the 1000-cubes, 100-flats, 10-rods, and 1-cubes to make it. You can change the number base to work in base 2, base 3, etc.
Maths Teacher's Toolkit
Includes place value calculator, place value cards, interactive number line, hundred square, and other interactive Flash resources.
Place the Penguins
Practice breaking up the numbers into tens and ones, or into hundreds, tens and ones in this game.
A self-teaching worktext for 1st - 3rd grade that covers basic shapes, right angle, symmetry, area, perimeter, and solids.
Download ($5.95). Also available as a printed copy.
Shoot a fruit with an even or odd number, whichever one your aim tells you. Three levels: 1-10, 1-20, and 1-100.
Odd or Even?
Drag and drop the number cards to their correct place in the diagram (even or odd). three difficulty levels (numbers 1-10, 1-30, or 1-100).
Roman Numerals Tutorial
Good explanations of how numbers are formed using Roman Numerals, such as when to "add" or "subtract" the symbols. The page allows interactivity where the student can self-check his/her understanding.
This article includes charts, an interactive converter, explanation of the system, its history, modern use, and more.
Roman Numerals Worksheets
Generate worksheets for converting Roman numerals to normal (Arabic) ones, or normal numbers to Roman numerals, or do easy addition and subtraction problems with Roman numerals. Both PDF and html formats available.
Roman Matching Game
Drag the Roman numerals to the corresponding Arabic numerals. If you win the next game will be faster. See if you can beat the clock!
Roman Numerals - A Maths Webquest
A set of web pages where you can learn all about roman numerals: how they originated, how to read & write the numerals, and places we still use the Roman number system today.
Roman Sequence Game
See how fast you can put these Roman numerals in the correct sequence.
A self-teaching worktext for 2nd grade that covers mental addition and subtraction with two-digit numbers, and regrouping in addition and subtraction (carrying & borrowing).
Download ($5.65). Also available as a printed copy.
These pages teach number naming skills covered in K8 math courses. Each page has an explanation, interactive practice and challenge games about naming numbers.
Powers of ten
A 9-minute movie that illustrates the dramatic changes of scale when zooming in or out by powers of ten (40 powers of ten), starting from a picnic blanket and ending in the universe, and then starting from a hand to the proton inside an atom.
Free rounding worksheets
An unlimited supply of rounding worksheets with lots of options. You can choose to round to a fixed place value or make mixed rounding problems. Other options include the number problems, workspace, font size, and thousands separator as a period, comma, or space.
You'll be asked to round numbers in the thousands to the nearest hundred. Click on the shark that has the correctly rounded number.
Choose either "1 pointer," "two pointer," or "three pointer button". You're given a rounding problem to the nearest ten, nearest hundred, or nearest tenth. If you answer correctly, the character makes a basket.
Round decimals to whole numbers, and you'll get a chance to kick the ball to the goal.
Drag as many gorillas as you can into the elevator without exceeding the weight capacity of the elevator. You will have to use your quick addition, estimation, and number sense skills.
Home Run Derby Math
Estimate answers to math problems. The closer you get, the further your ball will fly at-bat. In addition and subtraction, the numbers are in the thousands. In multiplication, the numbers are in the hundreds.
A self-teaching worktext for 1st - 3rd grade that covers measuring length, weight, volume, and temperature, in both customary and measuring units. The book includes lots of hands-on projects.
Download ($4.85). Also available as a printed copy.