(Portland, OR) -- A former substitute teacher with the Reynolds School District is charged with sexual abuse for the assault of a nine-year-old girl. Court documents show 53-year-old Dale Buckendahl pleaded not guilty in court yesterday to two counts of sexual abuse in the first degree. Prosecutors say he groomed and eventually sexually assaulted a nine-year-old girl from 2007 to 2008 at Alder Elementary School. It's not the first time Buckendahl has faced allegations of inappropriate behavior in the classroom. The state Teacher Standards and Practices Commission suspended Buckendahl in 2003 for inappropriate contact with students and for trying to view porn on his classroom computer.