Students learn new or difficult information most effectively when the classroom environment is compatible with their learning style preferences. Determining learning style preferences can be accomplished by administering the Learning Style Inventory (LSI). However, to understand compatibility with the classroom, an instrument that quantifies student perceptions of elements within the environment is essential. This paper describes development and field-testing of such an instrument--the Student Perception Inventory (SPI). The SPI was administered to 80 gifted middle school students and was found to provide useful student perception data. Information needed to improve learning environments for gifted learners, especially underachieving gifted students, was found when using the LSI in conjunction with the SPI.