Find lessons and content with Google Workbench
Source: Workbench
Google Workbench is a repository of lesson plans that you can find through search. The search allows you to drill down through grade levels, content, project duration, and learning standards. Lessons can be assigned through Google Classroom or Clever.
It’s all free, but they do have some premium features if you want to contact them.
Be sure to check out the Getting Started on Workbench lesson!