Microsoft Whiteboard is a free-form, digital canvas where people, content, and ideas come together. You can use Whiteboard to collaborate with other people and accomplish many activities, from brainstorming and planning to learning and workshops. 

https://youtu.be/YBnojDFXo4k

Advantages

• Free to use if Microsoft account is available. 
• Automatic save option.

Disadvantages

• Students must log in with a Microsoft account.

Manual? Please follow this link. 

Nearpod is an interactive classroom tool to engage students by adding interactive activities to your lessons like polls, collaboration boards, and game-based quizzes. Students can interact and submit responses through any mobile device or laptop.

https://youtu.be/4VliWohdvAg

Advantages

• Easy to use.
• Works on any device.

Disadvantages

• Students must have internet access.
• Presentations are not downloadable. 
• Price.

Virtual Labs offers students an innovative virtual learning environment where they perform Lab practices virtually in an engaging and risk-free environment.

https://youtu.be/Zz7r_wLRf5k

Advantages

• Deliver a fully online experiential learning. 
• Track and evaluate students' progress.
• Not free.

Disadvantages

• Computer access is required.
• Requires a team of experts and strong knowledge of programming.

It is a teaching and learning network of shared materials, from K-12 through college, from algebra to
zoology, open to everyone.

Advantages

• Offers a lot of study material.
• Integrates well with other tools that teachers use.
• Expanded access to learning.
• Any topic, any type of resource is available. 

Disadvantages

• Too many materials to choose from.