There are dozens of federally funded
Title VI National Resource Centers (NRCs) at universities around the United States. One of their many functions is to provide curriculum materials, teacher education, travel opportunities for teachers, scholarly speakers, and more. Through the centers' websites, you can find a wide array of resources: lesson plans, culture boxes, Skype-based classroom speakers, and more.
Many NRCs also organize summer institutes for teachers. Some institutes have funding available to defray travel expenses for out-of-town participants. The University of California, Berkeley has compiled
a list of summer institutes for teachers around the country. Information is posted as it becomes available.