If you would like to make it possible for users (or you!) to donate, you might consider adding the following to your course_info.txt or site_info.txt files:
If you would like to donate to The WeBWorK Project:
<form action="https://www.paypal.com/cgi-bin/webscr" method="post" target="_top">
<input type="hidden" name="cmd" value="_s-xclick">
<input type="hidden" name="hosted_button_id" value="QQ6ZW86P2JF8W">
<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donateCC_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
<img alt="" border="0" src="https://www.paypalobjects.com/en_US/i/scr/pixel.gif" width="1" height="1">
</form>
Please note that we have not yet applied for a charitable designation so until then any donations would NOT be tax deductible.
Enjoy!