An Invisible Sign
- taona: 2010
- Firenena: United States of America
- Genre: Family, Drama, Romance, Comedy
- Studio: Ideal Partners, J2 Pictures, Silverwood Films
- Keyword: mathematician, elementary school, math teacher, scientist, woman director
- tale: Marilyn Agrelo
- Cast: Jessica Alba, Bailee Madison, J.K. Simmons, Chris Messina, Sônia Braga, John Shea