51,853,016 Videos Watched

Age Filter: Click to Set

Embed Video
Embed Video:
URL of source video:
Simply give the URL and we will get the embed code automatically, if we support embedding from the site.

Number & Operations Manipulatives

Category Videos
Not Right For WatchKnowLearn
Ages: 8 - 14
3329 Views:
Diffy - Virtual Manipulative
From usu.edu, produced by Utah State University
When Diffy opens, there are four black numbers placed at the corners of a black square. Your first goal is to fill in the four blanks in the blue circles in the middle of each side of the black square. Start with any side of the black square and cli... [more]
May 9, 2010 at 11:11 AM
  • Favorites

Not Right For WatchKnowLearn
Ages: 10 - 15
1996 Views:
Color Chips
From usu.edu, produced by Utah State University
This virtual manipulative uses plus-minus chips to demonstrate adding positive and negative values. Using this virtual manipulative you may: Solve a problem using chips or try a new problem.
May 9, 2010 at 10:57 AM
  • Favorites

Not Right For WatchKnowLearn
Ages: 4 - 10
2902 Views:
Virtual Abacus
From usu.edu, produced by nvlm.edu
This virtual manipulative abacus allows children to explore other representations of numbers.  (It uses a Java applet).
May 9, 2010 at 09:54 AM
  • Favorites

Not Right For WatchKnowLearn
Ages: 5 - 10
2501 Views:
Chip Abacus
From usu.edu, produced by Utah State University
With this manipulative, you can represent place value and exchanges in base 2, base 5, or base 10. Set the desired base with the up and down arrow buttons below the workspace. Chips in columns then represent units (1), bases (2, 5, or 10), and base-s... [more]
May 9, 2010 at 10:40 AM
  • Favorites

Not Right For WatchKnowLearn
Ages: 5 - 11
1514 Views:
Circle 0 - A Virtual Manipulative
From usu.edu, produced by Utah State University
The goal of this puzzle is to put three numbers inside of each circle so that they add up to 0. Solve the puzzle by dragging the black numbers to the blank spaces. You cannot move the blue numbers. When the three numbers inside any circle add up to ... [more]
May 15, 2010 at 07:29 PM
  • Favorites

Not Right For WatchKnowLearn
Ages: 10 - 16
1369 Views:
Virtual Manipulative-Circle 99
From usu.edu, produced by Utah State University
Circle 99 – A puzzle involving adding positive and negative integers to sum to ninety nine. Instructions are on the right side of this virtual manipulative. The goal of this puzzle is to put three numbers inside of each circle so that they add up t... [more]
May 9, 2010 at 10:50 AM
  • Favorites

Not Right For WatchKnowLearn
Ages: 7 - 12
1361 Views:
Circle 21 - A Virtual Manipulative
From usu.edu, produced by Utah State University
The goal of this puzzle is to put three numbers inside of each circle so that they add up to 21. Solve the puzzle by dragging the black numbers to the blank spaces. You cannot move the blue numbers. When the three numbers inside any circle add up to... [more]
May 15, 2010 at 08:07 PM
  • Favorites

Not Right For WatchKnowLearn
Ages: 9 - 12
1321 Views:
Constructing a Factor Tree
From nextvista.org, produced by NextVista.Org
In this video, a teacher demonstrates constructing a factor tree for the number 40.  Factor trees are used to find the prime factorization of composite numbers.  The teacher explains the process step-by-step as the factor tree is created on chart pap... [more]
January 7, 2012 at 11:49 AM
  • Favorites

Not Right For WatchKnowLearn
Ages: 12 - 18
1301 Views:
Dueling Calculators – A Virtual Manipulative
From usu.edu, produced by Utah State University
Dueling Calculators – Visualize a dramatic simulation of the effect of propagating rounding errors. There are more instructions to the right of the manipulative.
May 17, 2010 at 10:32 PM
  • Favorites

Not Right For WatchKnowLearn
Ages: 10 - 16
1225 Views:
Number Puzzles - A Virtual Manipulative
From usu.edu, produced by Utah State University
This virtual manipulative poses problems requiring you to arrange numbers in positions in a diagram so that all numbers in a line add up to a given value.
May 17, 2010 at 10:17 PM
  • Favorites


Loading featured videos...


12 NEXT (1 - 10 of 18)
History [show]


Loading history...

Comments
Please make your comments on categories positive, and not just negative.

People work hard on educational categories, and we want to encourage them to make more!

  • Profanity (curse words), sexually suggestive remarks, and other such obviously inappropriate comments will be deleted immediately, and are grounds for immediate expulsion. Remember, children use this website.
  • Personal criticism on project forums and in video content is not allowed and will be deleted immediately. Any violations of this rule could result in expulsion from the project so please, no insults or other negative personal remarks.
  • Very harshly-worded criticism of content will also be deleted promptly. Please use your vote to express your harshest feelings. Repeated violations of this rule can result in expulsion. If you must criticize another person's hard work, then be nice about it.
If you want to comment, please sign in
Reason:  

  Cancel

Share