Second Order Ordinary Differential Equations
http://www.maa.org/taxonomy/term/41680/0
enEuler-Cauchy Using Undetermined Coefficients
http://www.maa.org/programs/faculty-and-departments/classroom-capsules-and-notes/euler-cauchy-using-undetermined-coefficients
<div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><em>It is shown that Euler-Cauchy equations with certain types of nonhomogeneous terms can be solved by the method of undetermined coefficients.</em></div></div></div>An Elementary Proof of an Oscillation Theorem for Differential Equations
http://www.maa.org/programs/faculty-and-departments/classroom-capsules-and-notes/an-elementary-proof-of-an-oscillation-theorem-for-differential-equations
<div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p><em>A new and elementary proof for a theorem in differential equations</em></p>
</div></div></div>Modeling Higer-Order ODE (WOLFRAM)
http://www.maa.org/programs/faculty-and-departments/course-communities/modeling-higer-order-ode-wolfram
JOde: A Java Applet for Studying Ordinary Differential Equations
http://www.maa.org/programs/faculty-and-departments/course-communities/jode-a-java-applet-for-studying-ordinary-differential-equations-0
Maple Worksheets on Second Order Differential Equations
http://www.maa.org/programs/faculty-and-departments/course-communities/maple-worksheets-on-second-order-differential-equations
Interactive Math Programs
http://www.maa.org/programs/faculty-and-departments/course-communities/interactive-math-programs
EqWorld
http://www.maa.org/programs/faculty-and-departments/course-communities/eqworld
Interactive Mathematics
http://www.maa.org/programs/faculty-and-departments/course-communities/interactive-mathematics
Second-Order Linear Homogeneous Equations
http://www.maa.org/programs/faculty-and-departments/course-communities/second-order-linear-homogeneous-equations
Second-Order Linear Inhomogeneous Equations
http://www.maa.org/programs/faculty-and-departments/course-communities/second-order-linear-inhomogeneous-equations
MIT OpenCourseware: 18.03 Differential Equations
http://www.maa.org/programs/faculty-and-departments/course-communities/mit-opencourseware-1803-differential-equations
Modeling Spring Mass
http://www.maa.org/programs/faculty-and-departments/course-communities/modeling-spring-mass
COMAP Collection of ILAPs
http://www.maa.org/programs/faculty-and-departments/course-communities/comap-collection-of-ilaps
Free and Forced Motion Lab
http://www.maa.org/programs/faculty-and-departments/course-communities/free-and-forced-motion-lab
Scriptable ODEs
http://www.maa.org/programs/faculty-and-departments/course-communities/scriptable-odes