In this lesson Mr Choc teaches you about BPM's (beats-per-minute) using a stop-watch or a clock to help count accurately. BPM's show you the general speed of the record you’re spinning. Using bpm's and your ears, a dj determines what other records will mix with the one your playing.

• note to student: Don't forget to use your ears, just because two songs have similar tempos does not mean they will mix