Active Visual Scaffolding by Charles Kelemen and Eugene Turk
A more interesting animation is:
But the student has to work much harder to generate it:
<![CDATA[
import java.io.*;
import java.util.Random;
import java.awt.*;
class InsVis {
/* Sort a[0 ... (n-1)] into ascending order
* using an insertion sort.
*/
static void sort(int a[], int n) {
ArrayGUI window = new ArrayGUI();
window.inAnApplet = false;
window.setArraySize(n);
window.setArray(a);
window.initArray();
window.pack();
window.setVisible(true);
window.redraw();
int pothole, temp;
....
]]>
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