I use dojo and it is very helpful. All of our teachers have dojo accounts. They set up their classroom (meaning they add the students and invite the parents to join) and then they "share" the classroom with me and the principals so we can message the parents as well. The teachers send a lot of info via dojo messages so parents are usually quick to open them. Other than the initial set up of an account for me to get started, there is no work for me. I use it when I haven't been able to reach a parent for pick-up or when I just need to get a non-urgent message to them. What is really nice is that dojo shows you that the message has been read and what time - no more "sorry I didn't get the message". Also, my student population has a lot of parents who do not speak english. So I can message them in dojo and it will translate into their primary language. They can then respond in their language and dojo can translate it into english for me. I would definitely recommend it.