Teachers will now be able to search for and recommend learning content by category, grade level, and a variety of other criteria, and will have the opportunity to discover content recommended by other educators, for example, TechCrunch reports. What’s more, every piece of content served within its curated portal is pre-approved by educators before being posted, so that teachers can rest easy knowing the recommended content is quality and school-appropriate. Google has already begun to recruit content partners, with NASA and PBS among those that have already signed on to make their content available to users when the store goes live this fall. Yerga said that the team plans to begin accepting content submissions from developers at some point this summer…