| GRE 27 | 50 | April 22, 2012 |
| Mastering Spanish Vocabulary 50 | 45 | January 23, 2012 |
| Mastering Spanish Vocabulary 49 | 21 | January 23, 2012 |
| Mastering Spanish Vocabulary 48 | 38 | January 23, 2012 |
| Mastering Spanish Vocabulary 47 | 58 | January 23, 2012 |
| Mastering Spanish Vocabulary 46 | 35 | January 23, 2012 |
| Mastering Spanish Vocabulary 45 | 44 | January 23, 2012 |
| Mastering Spanish Vocabulary 44 | 78 | January 23, 2012 |
| Mastering Spanish Vocabulary 43 | 69 | January 23, 2012 |
| Mastering Spanish Vocabulary 42 | 48 | January 23, 2012 |
| Mastering Spanish Vocabulary 41 | 70 | January 23, 2012 |
| Mastering Spanish Vocabulary 40 | 34 | January 23, 2012 |
| Mastering Spanish Vocabulary 39 | 30 | January 23, 2012 |
| Mastering Spanish Vocabulary 38 | 41 | January 23, 2012 |
| Mastering Spanish Vocabulary 37 | 57 | January 23, 2012 |
| Mastering Spanish Vocabulary 36 | 28 | January 23, 2012 |
| Mastering Spanish Vocabulary 35 | 20 | January 23, 2012 |
| Mastering Spanish Vocabulary 34 | 168 | January 23, 2012 |
| GRE 26 | 50 | January 23, 2012 |
| GRE 25 | 50 | January 23, 2012 |
| Mastering Spanish Vocabulary 33 | 68 | January 21, 2012 |
| Mastering Spanish Vocabulary 32 | 44 | January 21, 2012 |
| Mastering Spanish Vocabulary 31 | 42 | January 21, 2012 |
| Mastering Spanish Vocabulary 30 | 46 | January 21, 2012 |
| Mastering Spanish Vocabulary 29 | 37 | January 21, 2012 |
| Mastering Spanish Vocabulary 28 | 86 | January 21, 2012 |
| Mastering Spanish Vocabulary 27 | 22 | January 21, 2012 |
| Mastering Spanish Vocabulary 26 | 107 | January 21, 2012 |
| Mastering Spanish Vocabulary 25 | 34 | January 21, 2012 |
| Mastering Spanish Vocabulary 24 | 24 | January 21, 2012 |
| Mastering Spanish Vocabulary 23 | 33 | January 21, 2012 |
| Mastering Spanish Vocabulary 22 | 50 | January 21, 2012 |
| Mastering Spanish Vocabulary 21 | 30 | January 21, 2012 |
| Mastering Spanish Vocabulary 20 | 162 | January 21, 2012 |
| Mastering Spanish Vocabulary 19 | 63 | January 20, 2012 |
| Mastering Spanish Vocabulary 18 | 64 | January 20, 2012 |
| Mastering Spanish Vocabulary 17 | 201 | January 20, 2012 |
| Mastering Spanish Vocabulary 16 | 175 | January 20, 2012 |
| GRE 24 | 50 | January 18, 2012 |
| GRE 23 | 50 | January 18, 2012 |
| GRE 22 | 50 | December 26, 2011 |
| GRE 21 | 50 | December 26, 2011 |
| Mastering Spanish Vocabulary 15 | 37 | December 23, 2011 |
| Mastering Spanish Vocabulary 14 | 112 | December 23, 2011 |
| Mastering Spanish Vocabulary 13 | 41 | December 23, 2011 |
| Mastering Spanish Vocabulary 12 | 96 | December 22, 2011 |
| Mastering Spanish Vocabulary 11 | 44 | December 22, 2011 |
| Mastering Spanish Vocabulary 10 | 16 | December 22, 2011 |
| Mastering Spanish Vocabulary 9 | 47 | December 22, 2011 |
| Mastering Spanish Vocabulary 8 | 29 | December 22, 2011 |
| Mastering Spanish Vocabulary 7 | 107 | December 22, 2011 |
| Mastering Spanish Vocabulary 6 | 33 | December 22, 2011 |
| Mastering Spanish Vocabulary 5 | 39 | December 22, 2011 |
| Mastering Spanish Vocabulary 4 | 30 | December 22, 2011 |
| Mastering Spanish Vocabulary 3 | 62 | December 22, 2011 |
| GRE 20 | 50 | December 13, 2011 |
| GRE 19 | 50 | December 13, 2011 |
| GRE 18 | 50 | November 26, 2011 |
| GRE 17 | 50 | November 26, 2011 |
| GRE 16 | 50 | November 26, 2011 |
| GRE 15 | 50 | November 26, 2011 |
| The Ultimate Spanish Review and Practice ch. 2 | 25 | June 29, 2011 |
| The Ultimate Spanish Review and Practice ch. 1 | 168 | May 10, 2011 |
| 501 French Verbs 1 | 25 | April 9, 2011 |
| Practical Spanish Grammar ch. 5 | 132 | April 4, 2011 |
| Mastering Spanish Vocabulary 2 | 160 | March 12, 2011 |
| Mastering Spanish Vocabulary 1 | 44 | March 12, 2011 |
| Practical Spanish Grammar ch. 4 | 72 | February 21, 2011 |
| Practical Spanish Grammar ch. 3 | 115 | February 21, 2011 |
| Practical Spanish Grammar ch. 2 | 66 | February 21, 2011 |
| GRE XVIII | 50 | February 5, 2011 |
| GRE XVII | 50 | February 5, 2011 |
| The Ultimate French Review and Practice ch. 7 | 15 | February 5, 2011 |
| The Ultimate French Review and Practice ch. 6 | 69 | February 5, 2011 |
| The Ultimate French Review and Practice ch. 5 | 20 | February 5, 2011 |
| The Ultimate French Review and Practice ch. 3 | 21 | February 5, 2011 |
| GRE 14 | 50 | February 4, 2011 |
| GRE 13 | 50 | February 4, 2011 |
| GRE 12 | 50 | February 3, 2011 |
| GRE 11 | 50 | February 3, 2011 |
| GRE 10 | 50 | February 2, 2011 |
| GRE 9 | 50 | February 2, 2011 |
| GRE 8 | 50 | February 2, 2011 |
| GRE 7 | 50 | February 2, 2011 |
| GRE 6 | 50 | February 2, 2011 |
| GRE 5 | 50 | February 2, 2011 |
| GRE 4 | 50 | February 2, 2011 |
| GRE 3 | 50 | February 2, 2011 |
| GRE 2 | 50 | January 30, 2011 |
| GRE 1 | 50 | January 30, 2011 |
| The Ultimate French Review and Practice ch. 2 | 162 | December 30, 2010 |
| Mastering French Vocabulary 1 | 65 | November 7, 2010 |
| The Ultimate French Review and Practice ch. 1 | 149 | September 11, 2010 |
| Practical Spanish Grammar ch. 1 | 91 | August 16, 2010 |
| Portuguese II | 25 | August 8, 2010 |
| Mastering Italian Vocabulary 5 | 20 | August 8, 2010 |
| Mastering Italian Vocabulary 4 | 59 | August 8, 2010 |
| Latin I | 15 | August 7, 2010 |
| Portuguese I | 25 | August 4, 2010 |
| Mastering Italian Vocabulary 3 | 60 | July 22, 2010 |
| Mastering Italian Vocabulary 2 | 114 | July 20, 2010 |
| Mastering Italian Vocabulary 1 | 46 | July 20, 2010 |
| Australia and the South Pacific | 32 | August 17, 2009 |
| Practical Spanish Grammar ch. 4 | 72 | August 12, 2009 |
| Practical Spanish Grammar ch. 3 | 76 | August 11, 2009 |
| Practical Spanish Grammar ch. 2 | 73 | August 10, 2009 |
| Practical Spanish Grammar ch. 1 | 82 | August 10, 2009 |
| Asia Capitals | 28 | August 6, 2009 |
| Africa Capitals | 59 | July 21, 2009 |
| Middle East Capitals | 28 | July 17, 2009 |
| Prego! ch. 4 | 132 | July 5, 2009 |
| Prego! ch. 3 | 130 | July 5, 2009 |
| Prego! ch. 2 | 101 | July 5, 2009 |
| Prego! ch. 1 | 115 | July 5, 2009 |
| Prego! capitolo preliminare | 90 | July 4, 2009 |
| Vis-à-vis ch. 16 | 57 | June 24, 2009 |
| Vis-à-vis ch. 15 | 48 | June 24, 2009 |
| Vis-à-vis ch. 14 | 92 | June 24, 2009 |
| Vis-à-vis ch. 13 | 76 | June 24, 2009 |
| Vis-à-vis ch. 12 | 73 | June 23, 2009 |
| Vis-à-vis ch. 11 | 54 | June 23, 2009 |
| Vis-à-vis ch. 10 | 61 | June 23, 2009 |
| Vis-à-vis ch. 9 | 82 | June 23, 2009 |
| Vis-à-vis ch. 8 | 75 | June 18, 2009 |
| Vis-à-vis ch. 7 | 56 | June 18, 2009 |
| Vis-à-vis ch. 6 | 84 | June 11, 2009 |
| Vis-à-vis ch. 5 | 126 | June 11, 2009 |
| Vis-à-vis ch. 4 | 76 | June 9, 2009 |
| Vis-à-vis ch. 3 | 100 | June 9, 2009 |
| Vis-à-vis ch. 2 | 106 | June 7, 2009 |
| Europe | 45 | June 7, 2009 |
| Latin America and Caribbean | 44 | June 7, 2009 |
| Canadian Capitals | 14 | June 7, 2009 |
| US Capitals | 51 | June 7, 2009 |
| Vis-à-vis ch. 1 | 104 | June 7, 2009 |