Batter-Up Bart #21
| Series | Simpsons Comics Presents Bart Simpson |
| Number | #21 |
| Publisher | Bongo Entertainment, Inc. |
| Date | 2004-12 |
| Type | Comic Book, Softcover |
| Language | English |
| Creator | Matt Groening |
| Editor | Bill Morrison |
| Copyright Holder | Bongo Entertainment, Inc. |
| Genre | Humor |
| Published in | Santa Monica, CA |
| Pages | 36 |
| UPC | 7 98342 02854 6 02911 |
| ISSN | 1532-6063 |
| Notes | Also: "The Three Stages of Teaching" & "Cuff It Up!" |
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