Nueva Ocotepeque [1] has a bilingual school, My Little Red House (www.mylittleredhousebilingualschool.com [2]), that is always looking for volunteers. They will accept volunteers for as little as one month, and while teaching experience is always welcome, nothing more than native English-speaking skills is required.
Accommodation is provided to volunteers. For more information on volunteering contact Ana Penman at 504/653-3042.
Links:
[1] http://www.moon.com/destinations/honduras/western-honduras/nueva-ocotepeque
[2] http://www.mylittleredhousebilingualschool.com