This interactive quiz first steps students through the derivation of the quadratic formula by completing the square, and then generates random quadratics for which students need to show the steps of solving by first finding the value of the discriminant, and then using it in the formula. There are two levels of difficulty provided. This activity is written using Lua.
Before the Activity
Preparation for this activity would be coverage of the method of completing the square for quadratics.
During the Activity
It is recommended that the teacher initially work through the steps of the activity with the class, and then set them to continue working on their own or in small groups.
After the Activity
Follow-up would be to study further work on quadratics, such as factoring and graphical transformations.