I suggest using this link to have students of intermediate level get knowledge of ancient civilizations of Ancient Greek, Indus, Anglo-Saxons, Vikings, Romans, and so on. Students will learn about their Lands, Discovery, Way of Life, Home Life, The Gods and Heroes,Trade and Travel, Art and Writing, Technology and Jobs, Food and Farming, Games and Toys, The End of those Civilizations, What They Did For Us.
Go and explore timelines.
This online game teach children reading, science, and social studies skills in the context of agriculture.It enriches students' vocabulary and also enhances their listening skills.Besides it provides with visuals which help students to memorize vocabulary.