Require Materials/Links on Co-ordinate geometry and Statistics and TENSE in verbal

[Vaithy]

Hi,
Where can I find the materials/links for Co-ordinate geometry and Statistics... I need to improve these areas.

Also TENSE in verbal is one another area I am very very weak. Pls tell me how I can improve on it. Is there any links/materials that i can use to improve these areas...

Thanks
Vaithy

[tictaktoe]

click down !!