The Consortium for the Advancement of Undergraduate Statistics Education sponsors webinars, online resources, and conferences focused on undergraduate statistics education. We especially recommend USCOTS, their biennial face-to-face conference and eCOTS, its alternate-year virtual counterpart.
tigerTree is associated with materials on trees and random forests that are used as supplements to the above textbook by Daniel Kaplan.
tigerstats
The tigerstats package contains a couple of the data sets used in the Vignettes for tigerTree.
tigerData
A few additional datasets that we find useful in our classes. Some are especially useful as the basis for a project involving trees.