Check out this resource!

www.thinkfinity.org

There are tools, curricula for teachers, activities and instructional
models for English language learners and other fabulous stuff for
literacy across all age groups.

There are also FREE online courses found under the
Thinkfinity Literacy Network section. The list of free, online courses
is huge and includes topics like: engaging hispanic parents, creating
community linkages, teaching technology, working with refugee families,
reaching out to homeless and migrant families, principles of adult
learning, family literacy, and many more. They have identified those
that would be helpful to potential volunteers, existing volunteers as
well as program staff.

There are also several online courses addressing volunteer management:
Volunteers in Parent Education, Volunteer retention, Incorporating
volunteers into your program's future