There are many educational sites online, some are free to educators and some are not. Here are few that might benefit you. Also, doing a Google search for 1st grade educational resources and the like will bestow many more.
DL Help
Instructions for logging-in to a Zoom session at BJHS (a quick guide)
General
Teacher Vision (this looks like the backdoor to the service, but you will at least get an idea of what the company offers)
Google for Educator Help Forum (if you have issues, more than likely, others have problems too - check out the forum for fast answers)
Kahn Academy (free resources for educators - nonprofit organization)
Mass Amounts of Online Resources (beneficial info and more)
30 Virtual Field Trips and Links (let's go to China)
PBS Learning Media (games, videos, and more)
EdPuzzle (a plethora or resources, free and paid)
Math
Imagine Math (provides 100's of VL-based math lessons at your fingertips)
History
Best U.S. History Website (a selection of top-notch history resources)
Ben's Guide to the U.S. Government (interactive learning)
Science
OpenSciEd (provides freely available, high quality, locally adaptable full-course materials)
The Best Science Website for Elementary Students (videos, experiments, and more)
Language Arts - English & ELA
10 Best ELA Tools for Middle School (hand-picked ELA apps, games, and websites)
Band