** 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**.

** Linear dependence/independence.**

** 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