Introduction
This is a short list of some of the flashbased interactivities I have made available to play online from my websites. I'm in the process of rewriting a lot of these with Scratch, read my Math Games weblog and interactivity weblog.
Popular Math Games Online
 The Frog Puzzle Online  Click on the lily pads to make the frogs move across the pond by hopping or sliding. Can you work out how
many moves you would need to shift any number of frogs?
 Flash Algebra  is it an algebra lesson about Flash, or a Flash
lesson on algebra? Plus interactive tools to solve linear, quadratic and simultaneous equations.
 Mathematical
Matches  A series of flashcard/concentration puzzles 
sometimes with an added interactive twist. Covers a wide range of
mathematical topics. Add your own, if you want.
 Interactive 100
Square Chart  Investigate patterns made by multiples of numbers in a 100 square. If that's too easy, try the nsquare
investigation.
 Tessellations 
(Actually, my students did this one  finalists in TwinSite 2000).
Investigating tessellation patterns in Logo and Flash. Escherstyle
tessellations and Islamic Patterns.
Linking Policy
Many teachers find it much easier to link directly to specific puzzles online, rather than direct their students to this index. Feel free to do this from your own classroom webpage.
Number Puzzles
 Magic Square, Magic Triangle 1 and Magic Triangle 2  The first three of a series of number puzzles. Drag the numbers onto the red circles to make the rows, columns and diagonals all add up to the same total. A more polished and extended version will appear on the Math Games website in October 2009.
 Magic Stars (1), Magic Stars (2) Two more from a series of number puzzles. Drag the numbers onto the red circles to make the sums and products of two sets of four numbers the same. A more polished and extended version will appear on the Math Games website in October 2009.
 Colour
Quiz  answer the simple addition questions. Correct answers
colour the picture in.
 Crossnumber
 Add the 5digit numbers together to give you the answers to the
clues in this crossnumber puzzle.
 Odd
One Out  Decide which calculation is the odd one out because it has a different answer to all the others. I was quite pleased with this mathgame, because it requires a little more thought that your standard arithmetic drill based on the four rules of number. I'm thinking of putting together a set of simpler versions of this puzzle for younger students.
 TableTimes

Simple multiplication quiz game, see how quickly you can answer 10
questions in a row correctly.
 Multiplication Tables  Want to learn any number's times table?
Also available as an asp script or a spreadsheet at InteractiveStuff.org...
 Bomb Numbers  The
old bomber arcade game  updated into an online mathematics drill. Drop
bombs on skyscrapers to answer multiplication table questions. For
those who prefer their mindless carnage online, there is also a retro version of
the original Bomber game.
 Build a Bug
 Speed arithmetic on the four rules of number  correct answers result in different bits of a bug being put together.
 Number
Maze  Move around a maze collecting numbers, plus and
multiplication signs to make a target of 100 in as short a time as
possible.
 Number Cruncher  Mathematical arcade game where you use the arrow keys to guide the number cruncher around the screen, collecting multiples as you move.
 Multiples
 simple feedback for identifying different multiples in a
list of numbers
 Sectors  what fraction of a circle
has been shaded? Answer in lowest terms!
 Shade

Shade in the correct number of regions to equal the fraction given.
 Fraction
Switch  Put the sequence of fractions into ascending order by
switching them round.
 Up to
One  Find the third fraction which when added to the two shown,
will bring their total to one whole.
 Equivalent
Fractions  Enter the correct numbers into the boxes to make a
series of equivalent fractions.
 Decimal
Challenge  Guess the decimal number between 0 and 10 that has
been chosen. Guesses are recorded and a number line is drawn.
 Sock
 3D online mathematical game based on an isometric grid. Push the green blocks into the holes to make the target number.
 Switch

Put the sequence of decimal numbers into ascending order by
switching them round.
 Scales

Move the pointer to match the decimal number given to you.
 Percentage Estimation  try to
estimate what percentage of the bar has been shaded. Score 3 marks
for being spot on. 2 for a very close answer, 1 for a fairly close
answer.
 Pie
Test  Estimate the size of the sector of the pie chart which has
been shaded yellow..
 Roman to Arabic  Convert Roman numerals into standard Arabic numbers.
 Arabic to Roman  Convert standard Arabic numbers into Roman numerals online.
Interactive Algebra Online
 Think of a Number  interactive discussion starter.
 Substitution
 Evaluate the expressions by substituting numbers for letters.
 Sequences

Work out the 4th, 5th, 10th, 20th and nth terms in a number
sequence.
 Algebra
Crossnumber  To solve this crossnumber puzzle, you also need to
work out what numbers x and y represent.
 Function Machine  To solve this problem, you must work out how to continue the sequence of numbers  drag the operators into the boxes on the function machine to help. Now available as 2 step and 1 step puzzles, for those of you who prefer to solve simpler math problems.
Measurement, Shape and Space: Interactive Geometry
 Making
Measurements  Finalist in the 2000 STEM Project awards. Four
interactive mathematical challenges inspired by the Weighing and
Measuring Gallery at the Science Museum.
 3D
Boxes  Calculate how many cubes you need to make the different 3D
shapes shown.
 Telling
the Time  A clock and simple matching exercises.
 Shape Game  Use the mouse to
click on the shapes and move them to the right container, but avoid
being caught by the other robots.
 Shape Sorter
 the most boring of three different shape identification
interactivities. A more interesting approach is the Binary
Tree interactivity  much more flexible, as it can also cope
with very different situations
 Geometrical Jumbles
 Unjumble the different geometry terms.
 Geometrical
Rainbow  Drag the letters into the pot to spell out the word
that matches the clue.
 Geometry
Facts  Decide which statements about geometry are true and
which are false in this short quiz.
 Angle
Estimator  Decide which angle is the same as the one drawn by the
computer.
 Projectile

Fire the cannon to hit the target  trial and error fun! Simple online example of a traditional mathematical computer game.
 Charts 
Draw pie charts and bar charts in Flash.
 Triangle
Test  Timed test for calculating the areas of different
triangles.
 Turtle 
A prealpha version of a turtle geometry parser in Flash. Copes with
sets of commands like: repeat 4 [repeat 5 [fd 30 rt 72 ] rt 90] but nothing too
fancy yet.
 Nets  Uses
my Flash Turtle to draw the nets of several different polyhedra
including octahedron, dodecahedron and icosahedron.
Fun With Handling Data
 Two dice
bar chart  draws a bar chart to show the result of rolling two
dice 150 times.
 How likely?
 If the probability of an event is 0.5, how likely would 12
successes out of 20 trials be? Use this interactivity to find the
answer to this and other questions.
 Marbles
 simulates an experiment where you remove red, green and blue
marbles with or without replacement
 Combinations  How many different cars,
football strips or ice creams can you create?
Puzzles, Maths Investigations, Trivia
 Mathematical
Hangman  Test your knowledge of common arithmetic terms with
this Hangman game.
 Amazing Age Cards  How does the
computer know which number you've picked?
 Bingo Card
Generator  Creates random bingo cards. Nothing more. However,
it did form the basis of my Dolch Word List talking bingo card
generator. One day I'll get round to developing the concept further.
 HighLow  Simple classic online math game. This is the first thing I usually try to write in any new programming language. How many tries do you need to guess a number between 1
and 999?
 Subtractor  An interactive doodle that plays with the
concept that multiplication is repeated addition and division is
really repeated subtraction.
 Famous Mindreading Card Trick  How can
the computer work out which one of 27 cards you're thinking about?
 Pick
Discs  Click on the discs to beat the computer, the last one to
click on a disc wins!
 TimeLord  A blast of nostalgia for devotees of old, retro computer games. Move the TimeLord around to avoid being exterminated by robots.
 Spacewar  Yes,
a not very good Flash version of the old classic. Suitable for
demonstrating gravity as an example of an inverse square law...
 Curves of Pursuit
 Actually, it's really curves of pursuit meets Xeno's Paradox
 up to 24 bugs follow eachother around the screen.
 Curve Stitching
 Click three times to draw a curve using just straight lines, click
in three places elsewhere for another one and so on...
 Estimating Pi
 Using the Monte Carlo method
 Conway's Life  The
original Life (0 player) mathematical game  done in Flash  for those of you who like simple cellular automata.
 Sierpinski Gasket,
Spleenwort
Fern, Julia
Set and Mandelbrot
Set fractals  all done in Flash.
