Choose the line segments to show on the ruler (checkboxes.)[br][br]Choose the increment to use for the arrow (buttons).[br][br]Click on the arrow. [b]Use the keyboard arrows[/b] to move the arrow.[br][br]Click the S/H for a simpler screen.

[url=https://tentotwelvemath.com/interactive/interactive-math-teaching-tools/]https://tentotwelvemath.com/interactive/interactive-math-teaching-tools/[/url]