Changed the order of the labs.
Minor wording to a problem involving an integrating factor.
Changes in the wording for the introductory modeling problems.
Added a section on variation of parameters for the 2nd order ODEs
Added a first draft for a new activity on second order DEs
Added a second part to the new worksheet.
Added an image to demonstrate the connections within the course topics.
Rearranged the activity on modeling.
Updated the modeling activity to include a problem on energy in the system.
Minor formatting changes for the 2nd order modelign activity.
Merge branch 'black_dev' of https://github.com/KellyBlack/ODE-Recitation-Activities
change the forcing term in linearModeling.tex, it was not possible for students to integrate
Merge branch 'master' of github.com:guangmingyao/ODE-Recitation-Activities