I have two older siblings who are nearly 3 years apart, but due to weird circumstances only ended up being one year apart in school by the time they ended up going to University....so, stuff happens. I think with the amount of moving around they did, Dean probably repeated a grade at one point - actually, I think Sam did too, because I believe I have him going to Stanford in the summer of '02, rather than '01.
Given that Dean never planned to get a regular job - and he already had fake ids - I think it was probably a case of him not bothering with school at some point (probably in '97/98 and just writing the GED test to get it over with. But yeah, he could have also gotten injured and then written the test later - or maybe Sam got injured and Dean stayed home to look after him, and they BOTH ended up missing enough school that Sam had to repeat a grade and Dean just wrote the GED test.
no subject
Given that Dean never planned to get a regular job - and he already had fake ids - I think it was probably a case of him not bothering with school at some point (probably in '97/98 and just writing the GED test to get it over with. But yeah, he could have also gotten injured and then written the test later - or maybe Sam got injured and Dean stayed home to look after him, and they BOTH ended up missing enough school that Sam had to repeat a grade and Dean just wrote the GED test.