I don't have formal preschool education but I run weekly themes where my crafts, stories, games, songs and learning all focus on one specific thing for the week like butterflies, dinosaurs, gardens, artists and so on. I teach wherever we are and whatever we do, even walking down the street is a learning experience, nature, city features, vehicles, animals, insects. We have little sponges all around us soaking up everything we say, just keep talking and get them talking, observing, touching things for sensory learning and you are doing a fine job.