Ultimate Tango School of Dance in Medford is offering a four-week Tango Fundamentals Course for advanced dancers on Sunday afternoons in December. Presented via Zoom, the course introduces all essential tango elements adding ochos, giros, medialunas, basic sacadas, barridas and passadas into danceable sequence. Cost is $120 for the course (Dec. 6, 13, 20 and 27). Register through the Ultimate Tango website: https://courses.ultimatetango.com/pages/virtual-advanced-courses