Teaching Aids

Mr. Math vintage 1972 teaching aid tools: 16,200 ppm Lead (90 ppm and up is unsafe for kids)

Mr. Math vintage 1972 teaching aid tools: 16,200 ppm Lead (90 ppm and up is unsafe for kids)

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May 9, 2021 — Sunday For those new to this website: Tamara Rubin is a multiple-federal-award-winning independent advocate for childhood Lead poisoning prevention and consumer goods safety, and a documentary filmmaker. She is also a mother of Lead-poisoned children (two of her sons were acutely Lead-poisoned in 2005). Since 2009, Tamara has been using XRF…

Unifix Math Counting Blocks Teaching Aid from Portland Public Schools: 1330 ppm Cadmium [a known carcinogen.]

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…

#AskTamara: Do Glass Dragon Tears Have Lead? (Aka: Squashed Marbles, Glass Drops or Mancala Stones?)

#AskTamara: Do Glass Dragon Tears Have Lead? (Aka: Squashed Marbles, Glass Drops or Mancala Stones?)

6 Comments
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#AskTamara Question: Do dragon tears have lead? Answer: Some do and some do not. Given the nature of the way most colored glass is commonly produced, many dragon tears do have at least some lead, and some have quite high amounts of lead — at levels considered dangerous for children by current/modern regulatory standards. [Even…