finish the deliverables of milestone3

3_data_exploration/README.md

@@ -1 +1,16 @@
-# Data Exploration
+# Data Exploration Guide
+
+- This notebook (`data_exploration.ipynb`) explores the final merged dataset used in the project. It does the following:
+
+  - Loads the cleaned dataset from `1_datasets`
+  - Checks dimensions, data types, and missing values
+  - Generates descriptive statistics
+  - Visualizes key variables including math proficiency in 2019 and 2023
+  - Explores distribution of learning losses
+  - Identifies countries with the largest changes in math proficiency
+
+- This notebook ( `class7_math_exploration.ipynb`)explores student-level data from **grade 7** in Bangladesh across 3 academic years (2019–2021). It includes:
+
+  - Loading the dataset from `1_datasets`
+  - Visualizing math scores by academic year using boxplots and histograms
+  - Observing trends in learning disruption during the pandemic period