Applets for drawing direction fields:
Direction fields 1 ,
Direction fields 2 ,
Direction fields 3 ,
Direction fields 4 ,
Direction fields 5 .
Applets for drawing phase portraits:
Phase portraits .
How to use applets. General guidelines , and a handout .
Integrating factor method.
Plotting with Mathematica for 6.4,6.5 .
Sample exams .
1st Midterm, practice .
Answers to MC problems are CCADAB.
Laplace transform table.
2nd Midterm, practice .
Answers for MC questions are: BCDCDD
Final, practice .
Answers for MC questions are: BCCCCCCB