These are lectures, for tutorials please
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 Todays lectures


General Psychology
http://webcast.berkeley.edu/course_details.php?seriesid=1906978464
Type:Video
-No previous knowledge needed.
-This classes are casted in several years
-The last year is recommended.
-The lectures tested had no or little problems and the lecturer is older
black hair man with glasses.
-Beginnings of first lectures are about sylbaus and may be skipped. You can watch these letures as they happen.
-lots of video lectures on site http://webcast.berkeley.edu
Rating:4.5/5
        

Plant Biology
Type:Final Exam with solutions
Rating: 4/5
Difficulty:2,5/5
-everyone can take this exam.
www.life.umd.edu/cbmg/faculty/acaines/bsci124/Examsample.html
        

Mathematics: Topology
Type:Lecture notes
http://at.yorku.ca/i/a/a/b/23.dir/ch1.htm
Difficulty:4/5
-some mathematical background needed
Not tested

Sodoku
http://www.math.nus.edu.sg/aslaksen/sudoku/ power point sodoku lecture
hosted by singapore university, learn sodoku. 

Science and spirituality views
Type: Lecture notes
Hosted by: Las Vegas University
http://faculty.unlv.edu/frostarn/MMSlectures.htm
Rating:4/5
Computer science: Theory of computation
Type:video,notes,exams with solutions,problems with solutions
Other lectures at the root:Yes
http://www.archive.org/details/arsdigita_08_theory_of_computation
Rating:4.5/5
Difficulty:3.5
Basic computer science knowledge needed. Theory of computation is considered very "true" computer science.
-some other lectures "near"
        

General Astronomy, introduction
This lecture is interesting and fun enough to keep you watching.
-If you like Hubble images this may be for you.
-Beginnings of first lectures are about sylbaus and may be skipped.
-No previous knowledge needed at all.
-previous version of this webcast was tested. 
The lecturer was young black hair funny man.
Type:Video
Rating:4/5
http://webcast.berkeley.edu/course_details.php?seriesid=1906978460

Comment: Newest Berkley video lectures are videocast. 
This mean you can watch them as they happen(few hours delay).

Some more(not tested):


http://ocw.mit.edu/OcwWeb/Physics/8-01Physics-IFall1999/VideoLectures/ 
popular lecture by mit profesor on physics

http://www.astro.ucla.edu/~wright/relatvty.htm
Relatvity
http://gaia.flemingc.on.ca/~pbell/bottoc.htm
Botany
http://tralvex.com/pub/nap/index.html
Artificial intelligence, neural networks; should be easy and nice with lot of pictures

hidden bonus lecture:sodoku 
http://www.math.nus.edu.sg/aslaksen/sudoku/ by singapure university