University of Hamburg
University of Hamburg: Chloroplasts and Other Plastids
This site provides detailed information on chloroplasts. Explains the many duties that chloroplasts perform and why they are so important. Good diagrams.
Curated OER
Science Kids: Science Images: Chloroplast Diagram
This diagram shows the basic structure of a chloroplast, featuring an inner membrane, outer membrane, intermembrane, stroma (aqueous fluid), lamella, lumen and more.