What Have You Learned?

Given some of the test results that I have seen, I want to give everyone a second chance to show me that they understand the work we're doing and the concepts that we're learning.

So here is my question to you:

Can you name one concept or topic that you have learned and understood this semester (not just this marking period)? Explain in your response what you understood about the concept.

The Shape of Parabolas

Question: How does the
co-efficient of the x-squared term
affect the shape of the parabolain a quadratic equation?

Please use proper math vocabulary when expressing your answer.

Can the Mystic Ball Read Your Mind?

It's time to ask a new semester of students to try this:

Check out "The Mystic Ball" at http://www.mysticalball.com/

Did it read your mind? Did it guess the right symbol?

More importantly, can you explain how it was done?