The NSF-funded National Science Digital Library (NSDL) has two initiatives that may be appropriate venues for advancing the explicit teaching of spatial thinking at all educational levels, up to and including undergraduate: NSDL Pathways and NSDL Science Literacy Maps 

Pathways

Pathways are topic-specific portals, or ‘views’ into National Science Digital Library resources. Currently, there are Pathways for Applied Math and Science, Biological Sciences, Chemistry, Physics and Astronomy, Computational Science, Engineering, Materials, Mathematics and Social Sciences. Does it make sense that there be a Spatial Thinking NSDL Pathway?

Science Literacy Maps

from the NSDL web site: “NSDL Science Literacy Maps are a tool for teachers and students to find resources that relate to specific science and math concepts. The maps illustrate connections between concepts as well as how concepts build upon one another across grade levels. Clicking on a concept within the maps will show NSDL resources relevant to the concept, as well as information about related AAAS Project 2061 Benchmarks and National Science Education Standards.