Jamboard is a free Google App that acts as a whiteboard where you and your students can share ideas and work together. With Jamboard you can:
Add sticky notes, drawings, images, text and more.
Create graphic organizers, simultaneously share ideas, annotate on text
Search Google and insert images or webpages.
Move images, texts, notes and drawings around on the screen easily.
Share an "everyone can edit" link with students in Google Classroom for whole-class collaboration.
In remote or online settings, students can work together in small groups in the same jam.
These resources will help get you started. Copy the templates to use in your classroom or create your own.