# Resources by The Virtual Textbook

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### Data Tables and Graphs

This series of interactive excel sheets aimed at Year Two students explores data tables and graphs. New questions and data sets can be generated each time by the click of a button.

The first five sheets generates a...

### Data Tables, Tally Charts and Graphs

This series of interactive excel sheets aimed at Year Three students explores collecting data, entering data into tables and drawing graphs. New data sets can be generated each time by the click of a button.

The first...

### Differentiation

This excel file plots both quadratic and cubic functions along with the graphs of their first and second differential equations.

By specifying the values of the coefficients of either the quadratic or cubic function...

### Direct Proportion

This interactive excel file has separate sheets which deal with direct proportion where the functions are linear, quadratic, cubic and square root.

Each sheet begins with a statement of the proportional relationship,...

### Discrete Random Variables - Coins

This series of interactive excel sheets explore discrete random variables, in particular those of coins and dice.

The first sheet offers a reminder of Pascal’s Triangle.

...

### Division

The first interactive sheet shows fractions where the numerator is 1. The fraction is converted into a decimal by long division and illustrated as the fraction of a circle. The denominator can be altered to be between 1 and 9. The next two sheets also show long division...

### Earth Geometry

This excel file shows the Greenwich Meridian, lines of longitude and parallels of latitude. It treats the Earth as a sphere. On the interactive sheets the position of two points on the globe can be altered.

There is a...

### Ellipse

This program deals with various aspects of the coordinate geometry of an ellipse. The first two sheets show the connection between ellipse and the auxiliary circle and also the focus/directrix definition of the ellipse. Subsequent sheets trace an interesting loci...

### Equations of Parallel and Perpendicular Lines

This excel program is about finding the equation of straight lines in the form ax+by+c=0. The first two sheets deals with the equation of the line through two given points and the equation of the line through a point perpendicular to a given line. The resource is an...

### Estimating

This series of ten interactive excel sheets explore estimating. Answers can be checked each time and new questions generated at the click of a button.

The first sheet shows a number line from 0 to 20, 50 or 100....