Announcements are intended for "one-way mass communication" to all members of a District, School, Class or Group. Announcements will display in the preferred language of the recipient. Members are unable to respond to announcements. 

Direct Messages
Direct Messages are two-way conversations between members.  A direct message will display in-app, send to email and/or SMS text message. Members can respond to the SMS text, email or within the Direct Message Center. Any member can send messages in his/her preferred language and the message will instantly translate it for the recipient. Recipients can see others that received the message and a response will send to all.