Have conversations in a Twitter-like chat room without having to register for an account. Take questions during class, have students post an exit ticket reflection, or use it for the class to share resources on a particular topic. (web-based, iPad friendly)
Lino gives you a free virtual corkboard for students to share ideas, pose questions, and post reflections. Teach students to color code their posts to quickly find the ones that need immediate attention and Lino can become the central hub for all your classroom collaboration. (web-based & iPad app)
Padlet is the perfect virtual wall for students to add resources, images, links and anything else they may need when working together as a team. Padlet's intuitive sticky note style makes it easy to simply click and contribute to the work of the class. (web-based & iPad app)