The Allen Institute for Brain Science provides free lesson plans and other wonderful teaching resources for neuroscience. There are a number of lessons that would work well for cognitive neuroscience students

Brainhack is a collaborative workshop that brings together neuroscientists and data scientists to work on using computational techniques to solve neuroscience problems. You can find descriptions of past projects and coding tutorials on their website.

The Adolescent Brain Cognitive Development Study (ABCD Study), which is sponsored by the National Institute of Mental Health (NIMH) is an ongoing longitudinal study following almost 12,000 youth in the United States from age 9 or 10 through early adulthood. The ABCD Workshop website provides resources for how to use ABCD data.