first: you start with your name and your agesecond: you then thank the class by giving you a chance to become president of the class third: you state your expectations for them as a class, set some rules and regulations to keep them in order, and then set their expectations for you as a president four: end the introduction with a bow to them and then to the teacher (if the adviser is there)
for my own opinion the online class is quite good as it is easy to answer the assignments like one click to send and view the answer and question and no matter where you are as long as the internet is good you can join the class but even better still really if f2f you can really learn and you can see your classmates teachers in person it's also more fun and there will be no lag