From 3d71ea0126021cf48137a32a36c5256d89cc0c4f Mon Sep 17 00:00:00 2001
From: CampusX <53361867+campusx-official@users.noreply.github.com>
Date: Thu, 13 Jan 2022 16:55:44 +0530
Subject: [PATCH] Update README.md

---
 README.md | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index b7df476..248cefc 100644
--- a/README.md
+++ b/README.md
@@ -181,7 +181,12 @@ The goal of this level is to get you introduced to the practical side of machine
         1. Feature Construction - https://www.youtube.com/watch?v=ma-h30PoFms
 19. #### Feature Selection
 21. #### Cross Validation
-22. #### Modelling - Stacking and Blending
+         1. What is cross-validation? - https://www.youtube.com/watch?v=fSytzGwwBVw
+         2. Holdout Method - https://www.youtube.com/watch?v=4NnI3SBuww4
+         3. K-Fold Cross Validation - https://www.youtube.com/watch?v=gJo0uNL-5Qw
+         4. Leave 1 Out Cross Validation - https://www.youtube.com/watch?v=yxqcHWQKkdA
+         5. Time series cross validation - https://www.youtube.com/watch?v=g9iO2AwTXyI
+23. #### Modelling - Stacking and Blending
          1. Stacking - https://www.youtube.com/watch?v=O-aDHBGMqXA
 24. #### Model Tuning and Selection
 25. #### Handling Overfitting