Watch Kara Tahta ( BLACKBOARD ) Episode 20 English Subbed online at Turkish Masa. Watch the Turkish Series Kara Tahta episode 20 for free with English Subtitles. Download the Turkish drama Kara Tahta episodes in high quality. Story Of Kara Tahta ( BLACKBOARD ) : Atlas, a math teacher, is assigned to teach at the school where he was bullied as a child. He meets up with his ex, Irmak, there. What will happen next in the story? Kara Tahta is my name (Blackboard).