Serendip is an independent site partnering with faculty at multiple colleges and universities around the world. Happy exploring!
Remote Ready Biology Learning Activities has 50 remote-ready activities, which work for either your classroom or remote teaching.
Additional Resources for NGSS Chemistry
Another source of NGSS-aligned activities is http://ngss.nsta.org/Classroom-Resources.aspx. Chemistry activities are included under physical science.
Good luck,
Ingrid