Gravitas Pub · Gravitas Publications, Inc.
| title | ISBN-13 | year of publication |
|---|---|---|
| Biology Pre-Level 1 Laboratory Workbook | 978-0-9799459-1-5 | 2008 |
| Chemistry Connects to Language | 978-0-9765097-3-8 | 2006 |
| Chemistry Level I Teacher's Manual | 978-0-9749149-8-5 | 2006 |
| Real Science -4- Kids, Biology I Connects to Language | 978-0-9765097-6-9 | 2006 |
| Real Science-4-Kids, Biology Level 1, Laboratory Worksheets | 978-0-9749149-3-0 | 2005 |
| Real Science -4- Kids, Biology Level 1 Teacher's Manual | 978-0-9749149-9-2 | 2006 |
| Real Science-4-Kids Chemistry I Laboratory Worksheets | 978-0-9749149-1-6 | 2005 |
| Real Science-4-Kids, Level I Combined Teacher's Manual | 978-0-9749149-6-1 | 2005 |
| Real Science-4-Kids Physics I Laboratory Worksheets | 978-0-9749149-5-4 | 2005 |
| Real Science -4- Kids, Physics Level I Teacher's Manual | 978-0-9749149-7-8 | 2006 |
Dr. Rebecca W. Keller · PhD, Rebecca W. Keller · R.K. · R. Keller · R William Keller · Rebecca W. Keller · Rebecca W. Keller Ph.D. · Rebecca W. Keller PhD · Rupp, Walter Keller · W. K. · W. Keller