General Instruction:
Chromebook App Hub (Get new ideas for teaching and learning with everything accessible on Chromebooks)
Achieve the Core (Resources for Common Core Standards in all subject areas)
Open Ed (resources for most subjects aligned to standards, as well as assessments)
Wonderopolis (Informational text for all sorts of questions that we wonder about)
Pixton (make online cartoons with content of your choice)
Quizzizz (Similar to Kahoot! ... with some more options)
Math:
Illustrative Mathematics (performance tasks & open-ended problems aligned to particular grade level standards)
Desmos (mostly pre-algebra and algebra skills; graphing calculator applications)
Would You Rather... (Students mathematically justify their answer)
Estimation 180 (Estimation activities to build number sense for each of the 180 school days)
Guided Math: A Framework for Mathematics Instruction by Laney Sammons
Multiplication Fact Family Practice
Science:
Real-World data for Science: https://www.data.gov/
Science Notes (Experiments, Ideas & Background Information)
Better Lesson (For NGSS)
Simulations for Science:
Middle School Computer Science in Science
Tech/Coding:
Tynker's Hour of Code (several options at all skill levels)