# NROER RESOURCES- VIDEOS OF TANGRAMS AND INTERACTIVES

The following VIDEO resources are linked to the nroer site where they can be freely downloaded

**TANGRAMS**

**MATH INTERACTIVES**

These interactives are good reference for math teachers. The level may not be typically suitable for primary classes. But they are good and interesting examples. The interactive nature of the resource is very useful for understanding concepts.

**Arithmetic** *http://nroer.gov.in/gstudio/resources/documents/show/42863/*

*This simulation will enhance your multiplication, division and factorisation skills along with increasing the accuracy in the same.*

**Estimation** *http://nroer.gov.in/gstudio/resources/documents/show/42867/*

*Using this simulation, one can explore size estimation in one, two and three dimensions. Multiple levels of difficulty allow for progressive skill improvement too.*

**Introduction to Fraction** *http://nroer.gov.in/gstudio/resources/documents/show/42877/*

*This simulation will help you to predict and explain how changing the numerator or denominator of a fraction affects the fraction’s value. You can also:*

*find matching fractions using numbers and pictures**make equivalent fractions using different numbers**match fractions in different picture patterns**compare fractions using numbers and patterns*

**Build a Fraction** *http://nroer.gov.in/gstudio/resources/documents/show/42879/*

*Using this simulation you can build equivalent fractions using numbers and pictures, compare fractions using numbers and patterns and also recognize equivalent simplified and unsimplified fractions.*

**Fraction Matcher** *http://nroer.gov.in/gstudio/resources/documents/show/42881/*

Using this simulation, you can find matching fractions using numbers and pictures.You can also:

- make the same fractions using different numbers
- match fractions in different picture patterns and
- compare fractions using numbers and patterns

**Area of a Circle** http://nroer.gov.in/gstudio/resources/documents/show/45976/

Find the area of a sector of a circle when radius is 3 units and if angle of the sector is

i) 60 degree

ii) 120 degree

What happens if angle changes to straight angle and to 360 degree ?

This geogebra applet helps you to explore area of a circle, semi-circle & minor and major sector of a circle. It also gives you an idea about what relation does each of them have with each other.

**Square** http://nroer.gov.in/gstudio/resources/documents/show/46016/

Using this Geogebra applet, one can generalize properties of a square.