"o.castillo.felisola@gmail.com" <o.castillo.felisola@gmail.com>
writes:

> I tried the following but does not work
>
> -----8<------------ Code Start --------->8------
> #+BEGIN_SRC emacs-lisp
> (eval-after-load "org"
>   '(add-to-list 'org-structure-template-alist
>     '("E" "\\begin\{equation\}\n?\n\\end\{equation\}" "")))
> #+END_SRC
> -----8<------------ Code End  --------->8------

It works fine here.  I insert <E at the beginning of the line then hit
TAB then the snippet is expanded.

What version of Org are you using?

--
 Bastien