Cost of light bulbs

Algebra Number Sense Science Social Studies Ratio and Proportion Probability and Statistics
 This activity has been updated (2026). See the new activity here:https://www.yummymath.com/post/light-bulb-cost-comparison/ There's a lot of misinformation out there about the cost to consu...
Unit rate estimation environment 6.EE.9 6.RP.3 rates 5.NBT.7 6.EE.1 6.NS.3 8.EE.8 Earth day 6th 7th 8th HS 5th 5.NBT.3 HSF.IF.C.7.B HSA.REI.C.6 climate change slope linear relationships