Over the years I used many tools to work together with teams that are in remote locations. From India, to the United States, from Romania to Switzerland. Now with COVID-19 the closing of physical schools led to a demand for solutions that can be used by teachers and pupils. Many people are working hard to provide services to support the schools and students. But let's not forget that we need a solution that requires a minimal understanding of technology and should work on basically any PC connected to the Internet equipped with audio (headset or built-in), and video (webcam). And equally important it should not require account creations and unnecessary sharing of your privacy details. As father of 3  (2 at the university, 1 at secondaire level) I see that schools are struggling and therefore also the children, especially at the mandatory levels. 
I am offering my support to get you kick-started and be able as close to normal within a day. Please contact me and see how I can help!