Math Medics
S.o.s. Math: First Order Differential Equations
This lesson defines a first order differential equation and provides links to properties of first order differential equations.
Harvey Mudd College
Harvey Mudd College: Elementary Solution Methods for First Order Od Es
Elementary Solution Methods for First-Order ODEs: Contains a large amount of information regarding first order differential equations, including definitions, examples, and basic properties.
Texas Instruments
Texas Instruments: Differential Equations
In this activity, students analyze first order, second order, and autonomous systems of two first order differential equations.
Texas Instruments
Texas Instruments: Higher Order Differential Equations
In this activity, students use the calculator to graph the solution to a second-order and third-order differential equations. They convert higher order differential equations by substitution to a system of first order differential...
Wolfram Research
Wolfram Math World: First Order Ordinary Differential Equation
This math site defines a first order differential equation. Includes information on how to solve an equation of this form and also how to find the roots.
University of Texas at Austin
Euler's Method
This site contains a description and problems dealing with Euler's method. The site discusses why the Euler method is not used in scientific computations.
Math Words
Math words.com: First Order Differential Equation
Explains what a first order differential equation is. An example is also given.
eFunda
Efunda: First Order Ordinary Differential Equations
This site from Efunda provides a defintion and examples of the use of first oder ordinary differential equations.
Other
Analytic Methods for Exact/linear Differential Equations
Shows how to solve both exact and linear differential equations.
Interactive Mathematics
Interactive Mathematics: Linear D Es of Order 1
Several problems are presented to demonstrate the process of solving linear differentiable equations using an integrating factor. A few of the examples have the solution hidden, so you can work the problem first then check your answer.