Back/Front End Editor Not Working

I am having problems using the Backend and Frontend Editor. Problems include:

(1) The Heading element, “Class Curriculum” cannot be seen or edited.

(2) Accordion items missing from the screen, see the attachment, under the “accordion” there are many accordion items; see the attachment.

(3) Editing an accordion item and the resulting dialogue box does not display the content, instead the box is uneditable.

Web page is located at http://www.skatebowl.biz/?page_id=604