Update README.md

Author: alanedelman

README.md

@@ -57,6 +57,9 @@ By the end of the course students will be able to use Julia to write write porta
 | 10 | W | 4/23 | Alomairy | GPU Acceleration |  [Slides](https://docs.google.com/presentation/d/1GqkKC3f7f1dcg-X1wcxQd-KYEoQgD-lP/edit#slide=id.p1)| |
 | 11 | F | 4/25 | Ringoot | GPU Acceleration |  [Slides](https://docs.google.com/presentation/d/1zqjzfpyOJOEiCR6sjz39_AlcaBZvccbV/edit?usp=sharing&ouid=111707541660722014594&rtpof=true&sd=true)| |
 |    |       |          |                            |  **Week 5 - GPU Computing**|    
+| 12 | M | 4/28 |  |  |   |
+| 13 | W | 4/30 |  |  |   |
+| 14 | F | 5/2 |  |  |   |
 |    |       |          |                            |  **Week 6 - Distributed Computing (MPI + Dagger.jl)**|    
 |    |       |          |                            |  **Week 7 - Parallelism Concepts and Julia Performance**|