What the hell is a lumen and why do I need it? I’m going back to candlelight. #lights #lightbulb #led #igoogledalumeniknowwhatitisnow

3 Ways to Assess Math Understanding More Deeply

Being understood is healthy. The pattern worth noticing is when someone goes from understanding you to repeatedly convincing you that nobody else can. That can make one relationship increasingly exclusive without anyone ever explicitly demanding isolation. There’s a big difference between “I understand you” and “I’m the only person who understands you.” Have you noticed the difference? #psychology #humanbehavior #predatorybehavior #understanding #endexploitation

The Light Bulbs You Need to Get Rid of IMMEDIATELY (New Research). The light bulb above your head right now may be quietly STARVING every cell in your body. Scientists just gave it a name: 21st century SCURVY. In less than one generation we deleted 95% of the natural light spectrum from human life, and almost nobody noticed. Press your finger over your phone's flashlight and you'll see a deep red glow. That's near-infrared light passing straight through your hand - the exact wavelength band that