There are several reasons
Computer is too old
If your computer is quite old, you should upgrade to a modern one
Computer is running out of memory
Does you computer have more than 8GB of RAM, and not using all of it up? A reboot may sometimes help
Internet speed is too slow
Either you, or the other person's internet is too slow.
Try testing the speed of your connection via the speedtest.net website
For best online classroom experience, your results should be :
- Ping : LESS THAN 15ms. Smaller number is better
- Download : MORE THAN 5 Mbps. Larger number is better.
- Upload : MORE THAN 5 Mbps. Larger number is better.
In general, any broadband plans are sufficient.
If you have ADSL, you need to upgrade to broadband.
Using public wifi
Some public wifis can be reliable, and some not. You'd have to give it a try
Using your mobile's 4G connection
If your country offers relatively cheap 4G mobile data, it should be sufficiently fast enough for a 5 person group lesson. It varies widely across mobile carriers, so you'd have to give it a try.
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