Now that his children are seven and nine, Christian Slater, 39, decided it was high time he finished high school. He told Parade magazine: “High school was not something that I remotely took seriously.” As the son of a casting director, he was playing regular roles on television by the age of seven. “And now I’ve got these kids, so it’s like . . . what am I going to do?” Slater admits, “I had to go to a high school classroom with a bunch of kids getting their GED [General Education Development diploma] . . . it ended up that I squeaked by.” His children are with ex-wife Ryan Haddon, whom he divorced in 2006. Slater currently stars in the new NBC-TV series My Own Worst Enemy.