| 2024-04-18 | For grades K-12 |
| 2023-08-16 | Educ. publishing division |
| 2019-08-14 | Comprehensive, in ed-speak |
| 2019-05-05 | K-12 |
| 2019-03-31 | K-12 |
| 2018-11-22 | K-12 |
| 2018-11-02 | Like many textbook publishers |
| 2018-06-24 | Precollege, for short |
| 2018-05-06 | K-12 |
| 2017-10-29 | K-12 |
| 2017-05-17 | For grades K-12 |
| 2017-04-23 | For grades 1-12, briefly |
| 2017-04-02 | K thru 12 |
| 2017-01-03 | Including all grades, briefly |
| 2016-07-24 | Precollege |
| 2016-04-21 | Textbook market shorthand |
| 2015-12-14 | K-12 |
| 2015-10-11 | All-inclusive, in edspeak |
| 2015-10-08 | All-grade |
| 2015-08-09 | Like certain educational publishing |
| 2015-05-07 | Precollege, briefly |
| 2015-03-14 | Not class-specific |
| 2015-02-18 | Thru 12th grade |
| 2014-11-16 | Like some textbook publishers |
| 2014-07-17 | Comprehensive, in edspeak |
| 2014-04-17 | Pre-coll. years |
| 2014-04-13 | K-12 |
| 2014-03-09 | Educ. book category |
| 2014-01-25 | Primary and secondary, briefly |
| 2013-07-08 | Grades 1-12 |
| 2013-06-02 | K-12, in education |
| 2013-06-01 | Not grade-specific |
| 2013-05-30 | Pre-coll., in education |
| 2013-05-21 | K-12, in education |
| 2013-05-16 | All the way through 12th grade, informally |
| 2013-04-22 | K-12, in education lingo |
| 2012-07-31 | Geared to 1st-12th grades |
| 2012-04-09 | For grades 1-12 |
| 2011-08-07 | K-12 |
| 2011-01-02 | Pre-college yrs. |
| 2010-12-21 | Grades K-12 |
| 2010-12-09 | For all grades |
| 2010-09-01 | Like some textbooks |
| 2009-03-22 | K-12 |
| 2009-02-23 | For grades 1-12 |
| 2008-08-06 | K-12 |
| 2008-06-15 | K-12 grades, collectively |
| 2008-04-14 | Grades 1 to 12, briefly |
| 2006-12-14 | Like some educ. publishing |
| 2006-10-09 | Relating to grades 1-12 |
| 2006-09-05 | K-12 |
| 2006-07-19 | K-12 |
| 2006-04-22 | Like some textbook publishers |
| 2006-02-13 | Type of textbook market |
| 2005-09-19 | 1-to-12, gradewise |
| 2005-06-16 | K-12 grades, collectively |
| 2004-11-29 | K-12, in education |
| 2004-07-04 | K-12, in education |
| 2004-04-25 | K-12, in education |
| 2004-04-18 | Like some textbook publ. |
| 2003-07-21 | Grades 1-12, for short |
| 2003-06-01 | K-12, educationally speaking |
| 2003-03-06 | For grades K through 12 |
| 2003-02-19 | Like some textbook publishing |
| 2002-02-27 | K-12 |
| 2002-02-17 | Pre-college yrs. |
| 2001-10-31 | Like some textbook publishers |
| 2001-06-03 | Like some textbook publishers |
| 2001-02-10 | Precollege |
| 2001-01-16 | Designed for all grades |
| 2001-01-10 | Like some schoolbook publishers |
| 2000-07-28 | K-12, in education |
| 1999-06-17 | Precollege |
| 1998-11-06 | Precollege |
| 1998-10-09 | Like some textbook publishing |
| 1998-06-23 | Precollege, briefly |
| 1998-06-10 | Like some textbook publishing |
| 1998-05-21 | For all grades, as textbooks |
| 1998-03-24 | K-12, scholastically speaking |
| 1996-10-20 | K-12, scholastically speaking |
| 1996-03-07 | K-12, educationally speaking |
| 1996-03-03 | Like some textbook publishers |
| 1995-11-05 | Curriculum range |
| 1995-06-24 | Precollege |
| 1994-10-04 | Denoting certain textbook publishers |
| 1993-12-28 | Like many textbook publishers |