Specific Applets

Rational vs Irrational
This resource allows students to identify various numbers and quickly determine whether they are rational or irrational having to place them in the correct category.
Relevant Core Standard

After explaining the difference between rational and irrational numbers, I would let students practice this online tool so they could better identify and understand the difference between rationals and irrationals and make further observations so as to more easily spot them.
Identify Rational vs. Irrational Game

Scientific Notation
This resource allows students to practice scientific notation and better understand how it works.
Relevant Core Standard
This resource might be shown to students as something they can practice at home if they want to better understand scientific notation without using pencil and paper. It will get them thinking critically about what scientific notation really means and how it works and will help them be better prepared to perform operations expressed in scientific notation that will be covered later in class.
Scientific Notation Game

Function Machine
This is a game where a number is put into the function machine (chosen by the student or the computer) and the machine spits out another number. This is repeated up to 5 times and utilizing the output, the student guesses what the function is based on the patterns found in x and y.
Relevant Core Standard
After going over functions, students will be given an opportunity to practice using the function machine which will help them better understand how functions work and that it's possible to figure many out mentally as well as by hand.
Function Machine

Test of Significance
This allows students to see a real-life example of statistics where a basketball is shot x-times and students test the hypothesis that 80% of free throws are made by College Basketball Players.
Relevant Core Standard
This would be shown in class to help students how events can be tested. After showing this, as a class we could go to the gym (if possible) and figure out our own classroom free-throw percentage!
Free Throw Test (Scroll down and click on "Test of Significance")

Conic Flyer
This activity allows students to explore the effects of changing the constants in the equations on the graphs of the conic sections including circles, ellipses, parabolas and hyperbolas.
Relevant Core Standard
After learning/deriving the equations of parabolas, circles, ellipses etc, students can use this applet to better understand how the graphs are affected when the constant values are changed.
Conic Flyer