at least half the time submitted is solo or duet work. For both levels, the dances must be presented at an open showing, and the works must be choreographed by someone other than the candidate. At both levels, short programme notes must be submitted detailing basic information about the dance, including the choreographer's name and the dance's intention. At both levels, Performance is weighted at 40%. Music SL and HL IB Music can be taken at either the standard level (SL) or higher level (HL). For both levels of IB Music the candidate must conduct a musical investigation. This requires research of two completely different musical genres with comparable qualities (e.g. Tuvan throat singing and Baroque opera). The information will then be presented in the form of a media script which will be assessed externally. There are three paths in which the IB Music SL course can be taken: group performance, solo performance, or composition. To fulfill the performance requirements, the candidate must perform either a 15-minute solo recital, or a 20-30 minute ensemble performance. A candidate who chooses composition should compose two original compositions (of which one may be an arrangement of an existing piece of music), each lasting between 3 and 6 minutes. Each of the two compositions should be recorded for assessment purposes. A score of both compositions must also be submitted. The IB Music HL course combines a medley of the IB Music SL options into a single curriculum. To satisfy IB Music HL, the candidate must perform solo for a total of 20 minutes and write three contrasting compositions (of which one may be an arrangement), each between 3 and 6 minutes. All candidates sit a written exam at the end of the course, which lasts 3 hours for HL candidates and 2 hours 15 minutes for SL candidates. HL and SL candidates answer two questions from section A (study of two prescribed works), of which one MUST be a comparison between the two prescribed works. HL and SL candidates are also required to complete Section B of the exam, which is aural analysis of four previously unheard extracts, of which two are named, and one has a score provided. Two candidates are unnamed and do not have a score provided. HL only candidates must also complete section C, a comparison of two extracts from section B. Section A responses must be written in essay