PLATE TECTONICS & PLATE BOUNDARIES:

www.windows2universe.org/earth/interior/plate_tectonics.html

www.moorlandschool.co.uk/earth/tectonic.htm

http://pubs.usgs.gov/gip/dynamic/dynamic.html

www.cotf.edu/ete/modules/msese/earthsysflr/plates1.html

http://www.platetectonics.com/book/index.asp

http://en.wikipedia.org/wiki/Plate_tectonics

(Wikipedia has some good drawings of the different boundaries)

EARTH INTERIOR:  

http://csep10.phys.utk.edu/astr161/lect/earth/interior.html

www.learner.org/interactives/dynamicearth/structure.html

www.solarviews.com/eng/earthint.htm

http://scign.jpl.nasa.gov/learn/plate1.htm

TIMELINE:

Wikipedia has a very complete list of geologists:

 http://en.wikipedia.org/wiki/List_of_geologists

and a timeline of geological discoveries and ideas:

http://en.wikipedia.org/wiki/Timeline_of_geology

Plate boundaries

http://www.classzone.com/books/earth_science/terc/content/visualizations/es0804/es0804page01.cfm?chapter_no=visualization

Plate movement

http://www.ucmp.berkeley.edu/geology/tectonics.html

http://earthguide.ucsd.edu/eoc/teachers/t_tectonics/p_plate_reconstruction_blakey.html

Paleomagnetism

http://earthguide.ucsd.edu/eoc/teachers/t_tectonics/p_paleomag.html

http://pubs.usgs.gov/gip/dynamic/dynamic.html

http://earthguide.ucsd.edu/eoc/teachers/t_tectonics/t_tectonics.html