Archive for maths

Teaching Subtraction

How do you teach a 7 year old to subtract? My attempt at learning flash and also understanding the psychology of a 7yr old. Tried to make it fun/colorful, relate to situations that are very familiar in daily life, provide some adrelanine rushes, some instant gratification via bells and whistles, and some non-trivial insight as well (for a 7yr old), general themes I would probably like to weave into all material here. Have beta-tested this with a couple of kids (the transitions might seem a bit slow but that is the speed at which 7 year olds read). The speed trial is a decent hit, the show me how is a bit too dense (any ideas how to make that better?). If your kids play with it, I would like to hear their comments.

Play Subtraction

Ack: The critter cartoons above are borrowed (I have lost track of the source though), all else is home-brewed.

Hello world!

We will start with pythagoras theorem:

\alpha^2+\beta^2 = \gamma^2

I also want to try some inline variables \alpha to see how this appears. We have to write some long sentences to see how they wrap.

Drawing a triangle

This is how we draw a triangle.

Let me now try to embed flash:

[flash  http://www.houseofalgorithms.org/gof/ramesh/flash/subtraction/myproject.swf]