Looking for a Valentine’s SEL activity that builds math and STEM skills? This Heavy Hearts Valentine STEM Challenge is a calm, engaging February STEM activity designed specifically for paperless classrooms using Google Slides. Students collaborate, communicate, and problem-solve as they design the “heaviest” Valentine heart using shapes, measurement, and strategy. The challenge feels like a game, but it is grounded in meaningful SEL skills, math thinking, and STEM problem-solving. This digita