Fraction Bars "Wiener Bruchrechentafel"
thingiverse
Revamping a Historical Educational Aid: A 3D-Printable Fraction Tool for the Visually Impaired Dating back to 1910 or earlier, this educational tool was designed to teach fractions to the blind. The original design and CAD model were discovered by Martin Schneider, with Golan Levin spearheading its recreation for 3D printing. Sourced from Archive.org, "Der Blindenunterricht" by Alexander Mell offers insights into this unique teaching method. While this initial design serves as a foundation, adjustments to thickness and gaps may be necessary for optimal 3D printing results. Share your experiences post-printing! Future improvements could include a 3D-printable layout in bars-only mode and the option for a hollow frame and bars.
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