Padlet is another way to collaborate with students or parents who want to quickly and easily post something for anyone to access. There is an option to post anonymously. It's a great tool for feedback or questions/concerns or even a way for parents and students to talk to one another.
This is a great app that will help students collaborate. The teacher can pose a problem or situation, and the students can use this on an iPad or laptop to share their research. There are many tools on this websited such as uploading videos or images, creating graphs, charts, and venn diagrams, and providing security and privacy for your class.