| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| mimiss | " Here's an example of teaching with similar air sensors from the EPA: https://www3.epa.gov/airnow/teachers/gh_pmsensorkit_handoutandinstructions.pdf " | Read more » | about 5 years ago | |||
| mimiss | "Do you have any photos of how the stains worked out? Or maybe notes on what concentrations of dye were too little/too much? " | Read more » | about 5 years ago | |||
| mimiss | "I did this! " | Read more » | about 5 years ago |