A mirroring or a projecting software inquiry in a small office network

Jul 2, 2018
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I have a small office network of about 7 pcs, and what i wanna do is give a specific course on my pc and project what am doing to the rest of the pcs on the network simultaneously, i'd like to get some suggestions about a software to help me do this because i don't know where to start, any help is appreciated.
Thanks.