Numerical Methods:

http://www.numerical-methods.com/

http://www.science-books.net/nummeth.htm (Books on Numerical methods)

Programming:

(1) Matlab

http://www.math.mtu.edu/~msgocken/intro/intro.html

http://www.maths.uq.edu.au/~gac/mlb/mlb.html

http://scv.bu.edu/SCV/Tutorials/MATLAB/

(2) QBasic

http://www.qbasic.com/ (Program and Tutorial)

(3) Visual Basic

http://members.tripod.com/~vkliew/vbtutor.html

http://www.vbweb.co.uk/show/30/1/

(4) Programming in C

http://www.cs.cf.ac.uk/Dave/C/CE.html