As a science teacher, I am always on THE lookout for high-quality equipment to help my students learn. The United Scientific Glass Spectrum is the perfect addition to any classroom. The accuracy of the spectrum is amazing, giving students a clear image of the light spectrum and how it affects different materials.As a result of using this product i found that my students were more engaged and enthusiastic about the subject matter. The price may be a bit steep, but the quality justifies the investment..