Questions about CS teaching to high school level students. This should be used when the context or level of the answer or question is that of high school students. In many cases, an AP tag is more appropriate because AP classes are typically taught in high school.
High school students learning Computer Science can be at any level. The level will vary with the school. Typically high school is when students are first introduced to Computer Science.
The tag is especially relevant for questions relating to subject matter taught in High School as well as for appropriate methodologies for the associated age group.