How to develop a circle equation in algebraic form when the circle touches the horizontal x-axis and learn how algebra is used in geometry to derive the equation of a circle in algebraic form in mathematics.
Ohio's Online Resource Center has a very good collection of inquiry-oriented, open-ended math questions that you can choose based upon grade level and topic! The range is from third grade to high school, so finding a quality question that meets your students' needs is easy!
How can you answer the perennial math question: "Am I ever going to use this in real life?" PBS's "Get the Math" website is a great way to show students how math is used in areas like music, fashion, and video game design. Thanks to Emily B. for sharing this one!
This is a good explanation of relationships that are NOT proportional and why. The candle problem is a good one--ask students, "How could you turn this into a proportion?" They would want to say that the statement should change to something like "How much candle is burned each hour?"