This interesting resource comes courtesy of the "Loci" project at the MathDL initiative, and it is part of the "Original Sources" series. Math scholars Dominic Klyve, Lee Stemkoski, and Erik Tou have created this helpful educational resource for fellow mathematics educators who might be interested in using primary documents from the Euler Archive. The Euler Archive was created by the folks at the Mathematical Association of America (MAA) and it gives interested parties access to the amazing observations about mathematics from that rare genius, Leonhard Euler. The resource helps teachers understand how to best use the Archive, along with offering their "top 5 picks" from the Archive, and so on. It's quite a resource, and one that will fascinate and delight those who value these historical ruminations and their classroom applications.