I'm posting these here because YouTube has trouble with them. The second one in particular is very large; I'm working on settings in the video capture software to fix this (that video is what it is; I'm hoping to make the next one smaller!)

the dice bar graph instructional video

the first fraction bars video: Leslie makes a unit bar calibrated in sixths.

the second fraction bars video: Leslie makes a unit bar calibrated in 12ths, which takes more precision.