Educational technology has evolved significantly over time. Early forms included using sticks to write in bark or leaves, while Ancient Egyptians developed hieroglyphics around 3100 BC. In Ancient Greece, Spartan education focused on physical training like wrestling and horseback riding. Over subsequent periods, ideas about education advanced, including those from thinkers like John Locke, Johan Comenius, and Maria Montessori. Important figures like Jean-Jacques Rousseau, Johann Herbart, and Friedrich Froebel further developed new methods and emphasized using real-world objects in learning. The advent of technologies like photography and instructional television further accelerated the development of educational technology.