. >> reporter: girls like jonna tucker.ocumented her dreams in a letter. >> when i'm 30 years old, i want to be the first female nfl player. >> reporter: you can imagine her excitement when she heard about the league. >> my mom, she got the e-mail at 6:30 and had me signed up by 6:35. she knew how much i wanted to play. >> reporter: there are four teams. >> run straight through that cone okay? >> reporter: tessie mae arce coaches the white hawks. >> you can be a girl off the field but on the field you are a football player. so i need you to be aggressive. >> reporter: this new program comes at a time of heightened concern over concussions. the adults that run the league say all coaches are certified to teach safer tackling and blocking techniques. >> they know all of the safety protocols in order to run a safer football league and they have been doing that. >> reporter: jonna tucker's mom knows the risk. >> she is doing something she loves and far being from me that i have that fear and wouldn't let her play. >> reporter: w