The Frey Scientific 569885 PTC Taste Paper is a paper test strip for students to investigate genetically determined taste responses and to study genetic transfer of dominant and recessive genes and random segregation, is impregnated with phenylthiocarbamide (PTC) which detects the presence or absence of a single gene, and comes in a clear plastic stoppered vial for transport and storage. When the insoluble test strip is placed on the tongue, seven out of ten people detect a taste while the other three do not taste anything. The test strip measures approximately 1.5 x .25 inches (H x W). (H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right.) Science education products incorporate applied math and science principles into classroom and homeschool-based projects. Teachers in pre-K, elementary, and secondary classrooms use science education kits and products alongside science, technology, engineering, and math (STEM) curriculum to demonstrate STEM concepts and real-world applications through hands-on activities. Science education projects include a broad range of activities, such as practical experiments in engineering, aeronautics, robotics, energy, chemistry, physics, biology, and geology. School Specialty provides instructional materials and supplies under dozens of brands, among them Think Math, Delta Education, Frey Scientific, Childcraft, and School Smart. The company, founded in 1959, is headquartered in Greenville, WI.