Activity
Varsity Tutors

Varsity Tutors: Hotmath: Practice Problems: Conic Sections

For Students 9th - 10th Standards
Hotmath provides 26 practice problems relating to conic sections. Each of the practice problems include a step-by-step guide for solving their conic.
Activity
Math Is Fun

Math Is Fun: Conic Sections

For Students 9th - 10th Standards
Students learn about conic sections. Topics include eccentricity, directrix, and the general equation. The tutorial consists of notes, examples, and practice problems to check for comprehension.
Activity
Mathematics Archives

Math Archives: Eccentricity in Polar Conics

For Students 9th - 10th Standards
Good site explaining Eccentricity in Polar Conics. The site is quite detailed.