One thing that puzzles a lot of young algebrists is the factors in a word problem that are taken as "understood". This presentation on solving systems of linear inequalities does a great job walking the learner through how to tease those...

Fourth graders watch a video and find the circumference of a pumpkin. In this circumference lesson plan, 4th graders watch a video to help them find the circumference of their pumpkins. Students define the word circumference on their...