An Invisible SignDVD - 2011
Mona Gray has lived in a hidden world of numbers since her father became ill when she was a child, now at age 20 she helps children discover the joys of math when she finds herself teaching an elementary school math class.
Publisher: Orland Park, Ill. : MPI Home Video, 2011.
Characteristics: 1 videodisc (96 min.) : sd., col. ; 4 3/4 in.
Alternative Title: 1nvisible si6n.