1. Watch the Introduction to Cleaning Data Using tidyr video:

2. Watch the Pivoting Wide Data to be Longer video:

3. Watch the Extracting Data From Within Columns video:

4. Watch the Separating Data From Within A Column video:

5. Watch the Combining Data From Multiple Columns video:

6. Watch the Making Long Data Wide video:

7. Watch the Gappy And Incomplete Data video: