Explore the use of open source forum software to facilitate online discourse outside the traditional classroom.
A network of online discussion forums on a wide variety of subjects
To answer this question
Here's another interesting example:
We can use the substitution $u=x^k$ to show that
$$\int_0^{\infty} \frac{\sin(x^k)}{x}\,dx =
\frac{1}{k}\int_0^{\infty} \frac{\sin(u)}{u}\,du.$$
Thus, the known result that
$$\int_0^{\infty} \frac{\sin(x)}{x}\,dx = \frac{\pi}{2},$$
yields
$$\int_0^{\infty} \frac{\sin(x^k)}{x}\,dx = \frac{\pi}{2k}.$$
There are issues.
In particular, it can be an intimidating resource for
beginning users.
There's quite a bit of open source Q&A software.
I've used
Discourse has a complete API that allows you to automate many tasks - particularly, surrounding grading.