Interactive apps

Teach, learn and practice computer science concepts.

Sample

Give it a try...

Tap/click a binary digit to toggle the bit to 0 or 1.
Show the carry bits.
When the answer is correct it will be highlighted in green.
Change the denary numbers to set your own problem.
Select Next Problem to try another random problem.
Robot

Using the apps

Demonstrate a concept to students from the front of the class.
Allow students to practice with infinite examples.
Choose a question number or go random.
Monitor progress at a glance.
No installation required.
Runs client-side in browser. No log in and no advertisements.

Binary apps

Binary addition

Add two denary numbers using binary. Includes overflow and carry bits.

Binary addition
Negative numbers

Represent a negative denary value in binary with either sign and magnitude or two’s complement.

Negative numbers
Binary subtraction

Subtract two denary numbers using binary.

Binary subtraction
Fixed point numbers

Convert a denary number with a decimal component to fixed point binary or vice versa.

Fixed point numbers
Floating point numbers

Convert a binary number with an 8-bit mantissa and 4-bit exponent into denary.

Floating point binary to denary
Denary to floating point

Convert a denary number into a floating point number with an 8-bit mantissa and a 4-bit exponent.

Denary to floating point
Normalisation

Normalise a binary number with an 8-bit mantissa and a 4-bit exponent, both stored in two’s complement.

Floating point normalisation
Hexadecimal

Convert a denary number through binary to hexadecimal or vice versa.

Hexadecimal numbers

Image apps

Image to bitmap

Show how an image is encoded into a bitmap.

Image to bitmap
Bitmap to image

Show how a bitmap becomes an image.

Bitmap to image
The range of apps is increasing

More apps are being developed right now.

In development right now are a suite of graph apps for A level.

Join Craig'n'Dave for FREE to stay informed.

Robot

How do I get access to all the apps?

Join us today to download a PDF of links to these apps and other free resources.

Instructions on how to use the apps are included in the downloadable PDF.

1. Log in | Join us
2. Download  links

Still stuck getting the apps? Please read our helpdesk article.

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