We have started investigating quadratics and will soon be adding a new number system to the mix to help us capture concepts that quadratics give rise to that linear and exponential models do not. Stay tuned on that. As for the basics of quadratics here are the concept development lessons around their graphs and behavior as well as the PowerPoint that marches us toward unknown territory.
Practice on the basics can be found on Khan Academy and TenMarks. Here is the link to Khan Academy and we will be onboarding TenMarks in the coming weeks.