This is a project about sign language and math. Mathematical language is a worldwide language which all students/people can understand and use to communicate mathematical ideas (and not only) among themselves. Also, sign languages all over the world present a lot of similarities and that is why hearing impaired students/people from different countries most of the times can communicate and understand each other. We decided to combine these two areas and sign math! Following that path can help our students exchange ideas, methods, practices and aspects of each country's culture.