The 1918 flu pandemic, commonly referred to as the Spanish flu, was a category 5 influenza pandemic caused by an unusually severe and deadly Influenza A virus strain of subtype H1N1.
Project Lead The Way (PLTW) is an American nonprofit organization that develops STEM curricula for use by US elementary, middle, and high schools.
What is PLT. Project Learning TreeÂ® (PLT) is the American Forest Foundation's environmental education program that produces high quality curriculum materials for students in grades PreK-12. PLT provides training and professional development opportunities for teachers, non-formal educators, and pre-service teachers (teachers in training.)