Dear Cherylann,
Thank you for troubleshooting on your end. Let’s check the other end too: could you ask the teacher to check that they’re using a fiber/cable (hardwired) internet connection and an Ethernet connection direct from their computer to their modem/router (with Wi-Fi off and VPN off)?
I understand you turn off IP address blocking. Is this done using an application on your MacBook Air or a setting on your router?
Could you share where you and your teacher are geographically (just sharing states would be fine)?
Also, on your end, please go to Preferences > General Options and change the Audio Buffer Size to 16 to slightly reduce local latency (from around 8 ms to around 2 ms).
Thank you,
David Liao
