![Unifix Math Counting Blocks Teaching Aid from Portland Public Schools: 1330 ppm Cadmium [a known carcinogen.]](https://tamararubin.com/wp-content/uploads/2019/03/Unifix-Math-Learning-Cubes-Teaching-Aid-Lead-Safe-Mama-2-768x576.jpg)
Unifix Math Counting Blocks Teaching Aid from Portland Public Schools: 1330 ppm Cadmium [a known carcinogen.]
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A school teacher with Portland Public Schools (in Oregon) anonymously gave me these small plastic snap-together UNIFIX math / teaching aid blocks to test. She initially had a concern that they might contain something toxic and unsafe for children primarily because of how they smell. Here’s an Amazon link to see this product in the…