TSO provides a series of online learning opportunities hosted by their Office of Communications and Education.
TSP Investment Funds
This TSP webinar provides an overview of the TSP investment funds. The agenda includes a discussion on investing to meet retirement goals, individual TSP funds (G, F, C, S, and I), TSP Lifecycle (L) Funds, and other TSP fund considerations. We will also introduce the new mutual fund window. This is a 1-hour webinar.
Register at https://www.tsp.gov/online-learning/
WhiteHouse.gov 
FEB.gov 
Data.gov 
USASpending.gov 
USA.gov 
OPM.gov