Extreme Science is a website that has a lot of simplistic definitions and explanations for many of the common themes and topics of the Earth Sciences and Biology.
Mathematics Illuminated is a thirteen-part series for adult learners and high school teachers. The series explores major themes in the field of mathematics, from humankind's earliest study of prime numbers, to the cutting-edge mathematics used to reveal the shape of the universe.
This website offers some fun acitivies and visual aids to include in the lesson for a german class. I could either use things from the website or build ideas of my own by just taking a look.
What a great website! I spent a good hour just looking at all the things on here. They have tips for us "new" teachers, ideas for lesson plans split up by subject and grade, articles from other teachers. if you have a bit of time check it out! it was really helpful to me