Surface Area to Volume Ratio:
This video does a nice job explaining why a cell cannot get too big because of this ratio.
You can watch this video to see how to calculate the surface area to volume ratio.
This page from CUNY.edu provides a clear description of why surface area and volume affect cell size.
Prokaryotic Cells:
This article from Khan Academy has an excellent diagram and explanation of the parts of prokaryotic cells. You can click on the left-hand navigation of the page for short videos, too.
Another helpful website is this interactive animated explanation of prokaryotic and eukaryotic cells.
Eukaryotic Cells:
Using this interactive site from Cells Alive provides information on the organelles found in plant cells and animals cells.
This table provides basic information on the organelles found in cells.
For the parts of a plant cell, this diagram shows the basic organelles.
This video also reviews of the parts of a plant cell and what the organelles do.
Check out this animated tour of a plant cell.
This simple diagram of the parts of an animal cell can be helpful as a resource.
This video explains the function of the organelles of an animal cell.
