Senior high in Alberta is organized into credit courses numbered by level: 10 (usually Grade 10), 20 (Grade 11) and 30 (Grade 12). Streams are shown by suffix: -1 (academic, university-bound), -2 (general) and, in mathematics, -3 (workplace); Math 10C is the common course that leads to the -1 or -2 sequence. Physical Education 10 and CALM are required.