These are PowerPoint slides from another economics textbook McConell, Brue & Flynn (20th edition). You may use them to complement your lecture notes and to help you with your revision.
Chapter 1
Chapter 1 (Appendix)
Chapter 2
Chapter 25
Chapter 26
Chapter 27
Chapter 28
Chapter 29
Chapter 30
Chapter 31
Chapter 32
Chapter 33
Chapter 34
Chapter 38