A secondary instrument besides the violin could be the cello. The cello is a string instrument that is larger than the violin and is played by sitting down and resting the instrument between the knees. It has a deep, rich sound and is often used in classical music, as well as in various other genres such as jazz and folk music. The cello is an important member of the string family and is often featured as a solo instrument in orchestral and chamber music settings. **

A secondary instrument besides the piano could be the guitar. The guitar is a popular choice for many musicians as it is versatile and can be used in a variety of musical genres. It is also relatively easy to start learning and can be played both as a solo instrument and as part of a band or ensemble. Additionally, the guitar offers a different playing technique and sound compared to the piano, making it a great complement to piano skills. **

Secondary chords in music are chords that are built on the notes of a scale other than the tonic (or main) note of the key. They are typically used to add variety and color to a musical composition. In traditional Western harmony, the most common secondary chords are the ii, iii, IV, V, and vi chords, which are built on the second, third, fourth, fifth, and sixth notes of the scale, respectively. These chords can be used to create harmonic movement and tension within a piece of music. **

The performance level at a secondary school can vary depending on a variety of factors such as the quality of teaching, resources available, student engagement, and support from parents and the community. Generally, a high-performing secondary school will have students who demonstrate strong academic achievement, critical thinking skills, and a high level of engagement in extracurricular activities. Additionally, a high-performing secondary school will have a positive school culture and a supportive learning environment that fosters student success. **

The secondary dominant is a chord that is not diatonic to the key but is used to create tension and lead to a chord within the key. It is typically the V chord of a chord other than the tonic, and it is used to temporarily establish a new key center before resolving back to the original key. In music theory, the secondary dominant is often notated with a Roman numeral followed by a slash and the chord it is leading to, such as V/V for the secondary dominant of the dominant chord. This chord progression technique is commonly used in classical and popular music to create harmonic interest and drive the listener's ear towards a specific resolution. **

Organ music refers to music that is specifically composed for or performed on the organ, a large keyboard instrument that produces sound by driving pressurized air through pipes. Organ music can range from classical compositions to contemporary pieces, and the instrument is often associated with church music due to its historical use in religious settings. Organ music can be performed solo or as part of a larger ensemble, and it is known for its rich, powerful sound and ability to create a wide range of musical textures. **

The piano is considered a keyboard instrument. While it does have strings inside that produce sound when struck by hammers, the primary way of playing the piano is by pressing keys on the keyboard. The keys are connected to the hammers that strike the strings, making it a unique hybrid instrument that combines elements of both string and keyboard instruments. **

The choice between art or music, geography or economics in upper secondary school ultimately depends on the individual's interests and career goals. If a student is passionate about creative expression and visual arts, they may benefit more from studying art or music. On the other hand, if a student is interested in understanding the world and its economic systems, they may find geography or economics more fulfilling. It is important for students to consider their strengths, interests, and future aspirations when making this decision. **