Scarcity: http://www.youtube.com/watch?v=yoVc_S_gd_0&list=PL336C870BEAD3B58B
Resource: http://www.youtube.com/watch?v=0PgP0dXAGAE&list=PL336C870BEAD3B58B
Micro and Macro Economics: http://www.youtube.com/watch?v=w8tUIq7Blsg&list=PL336C870BEAD3B58B
Positive and Normative statements: http://www.youtube.com/watch?v=AV_p_QntywA&list=PL336C870BEAD3B58B
Models: http://www.youtube.com/watch?v=lYHy2XLa4u0&list=PL336C870BEAD3B58B
Graphs: http://www.youtube.com/watch?v=uvnHPeQrk0E&list=PL336C870BEAD3B58B
Individual PPC: http://www.youtube.com/watch?v=JCEWQ_cafUs&list=PL336C870BEAD3B58B
Opportunity Cost: http://www.youtube.com/watch?v=PSU-_n81QT0&list=PL336C870BEAD3B58B
Society's PPF: http://www.youtube.com/watch?v=ApWWs_sZQQg&list=PL336C870BEAD3B58B
Introduction to Market structures: https://www.youtube.com/watch?v=9Hxy-TuX9fs