Meet our experienced staff


Jill Hartmann, of Hartmann Learning Center, has attained some of the highest levels of achievement in her field. She has a Master's Degree in the field of Education and over 20 years of experience educating children.  Our other teachers are experienced in the field of education. We are passionate about what we do.  We know what works and are able to adjust our strategies to meet the individual needs of our students.

Jill A. Hartmann
M.Ed., S.A.I.F.
(Specialist in the Assessment of Intellectual Functioning)
Erika Mahon
B.A. Ed.

Jill A. Hartmann is an educational evaluator, experienced teacher, and she has been directly involved in the field of education for over 20 years.  As a teacher, she has taught most grade levels from 1st grade through 8th grade and holds multiple certifications.  With her vast teaching experience, she has a wealth of knowledge to draw from to help her students.  

As an educational evaluator, she has had the opportunity to work with children of all ages to help identify their academic strengths and weaknesses.  By recognizing academic strengths and weaknesses, educational experiences can be tailored to promote individual learning.  Making the connection between evaluation results and appropriate educational interventions is one of her priorities.  In her reports, she strives to make results and recommendations useful and accessible to both educators and parents. 

In addition, Jill is currently working on her doctoral dissertation.  She has also presented in the United States and internationally.


Orton-Gillingham and Reading Training:

Jill is trained in Orton-Gillingham and holds an Associate Certification through the Orton-Gillingham Academy.  She had to complete 60 hours of direct instruction in the method and completed 100 hours of supervised tutoring using the OG method.  In addition to her OG training, she has a lot of other training in reading/dyslexia.  She has been trained in and used many programs that have come out of OG, such as LIPS (Lindamood-Bell), Seeing Stars (Lindamood-Bell), and Project READ.  She also has trained at Landmark School in their Language Based Program (Professional Development).  Landmark is one of the leading authorities in teaching children with reading and language issues.  They do not use the OG method, per se, but their program is incredibly similar.  It is based in the same principles.  She also does a lot of research and reading about neuroscience and learning. She tends to focus on reading and the brain and visual processing. Southern New Hampshire a wonderful location, with Harvard, MIT, and Children's Hospital right here in Boston.  There are some wonderful people and great research going on currently.  A lot of it is presented at the Learning and the Brain Conference each year in Boston.  Jill does attend this conference on a yearly basis in addition to following the research throughout the rest of the year.


Her Certifications include:

New Hampshire:

Elementary Education (K-8)

Specialist in the Assessment of Intellectual Functioning

General Special Education

Specific Learning Disabilities

Intellectual and Developmental Disabilities


Elementary Education (1-6)

Mathematics (5-8)

Moderate Disabilities (PreK-8)

Kristyn Riley
B.A. Ed.

Kristyn Riley is a recent graduate of Endicott College in Beverly, Massachusetts for Elementary Education. She has had multiple internships in the Londonderry, NH and Beverly, MA area during her schooling, which has given her experience in various elementary grades. Kristyn holds licenses in both Elementary Education (1-6) and Moderate Disabilities (pre-k-8), as well as being endorsed in Sheltered English Immersion. Kristyn completed her practicum in a third grade classroom at J.W. Killam Elementary School in Reading, MA. She has also completed several other student teaching experiences in Massachusetts, including in a second grade literacy placement in Cove Elementary School, a first grade Sheltered English Immersion placement at Bates Elementary, and fourth grade pre-practicum placement at Center School, and a third grade special education placement in Witchcraft Elementary School. Kristyn also has gained skill in working with students with various disabilities in her past positions in the Londonderry School District as a special education assistant for the Extended School Year program and a substitute for Londonderry South School.

During her time at Endicott College, Kristyn was accepted into the educational honor society Kappa Delta Pi, ran a group called EC Buddies which meets with people with disabilities in the North Shore area for social events, and was a part of the National Science Teachers Association.


Kristyn is currently completing her graduate courses to receive her master's degree in Reading and Literacy, in hopes of becoming a Reading Specialist. She is working in North Beverly Elementary School in the fall as a reading teaching fellow. 

Erika Mahon has been teaching for over 20 years and is certified in Early Childhood Education and Special Education. She has taught a variety of grades from kindergarten to fifth grade in both Massachusetts and New Hampshire. During her teaching career, she has worked as a general education teacher, a special education teacher, and a Title 1 teacher.


Erika grew up in Woburn, Massachusetts before moving to Derry, NH in 2005. She graduated from Salem State University with honors, and earned her Bachelor of Arts degree in Early Childhood Education. After graduation, Erika's love of learning led her to seek her Orton-Gillingham certificate from the Children's Dyslexia Center in Nashua, New Hampshire. This year long graduate course led to Erika's decision to earn her General Special Education license. 

When Erika is not teaching, she enjoys staying current with today's new teaching methods by taking continuing education classes. She enjoys gardening, kayaking, reading, and spending time with her husband, children, and grandchildren.


"If a child can't learn the way we teach, maybe we should teach the way they learn." -Ignacio Estrada

Erika's certifications include:

Early Childhood Education

General Special Education

Orton-Gillingham Certification

Clenna Emery, M.Ed.

Clenna is an experienced educator at the Middle School level. She has worked over 35 years in education. Her concentration has been primarily in the sciences but has also taught Math, Reading and Social Studies. She has worked as an Interim Assistant Principal and has substituted for several years. She is currently working with a school in Westford Massachusetts during State testing periods.


She has written many grants including working NASA on math and science lessons spending a week at Space Camp. She has studied whales and their habitat while onboard the Harvey Gamage, an 1800 replica of a Gaff Rigged Topsail Schooner. Clenna is as also involved in creating lessons for children to communicate across the US discussing their lifestyles.


Clenna has traveled throughout New England and even to Mexico to give presentations. Her presentations are centered on connecting math and science while involving children who struggle within a regular educational classroom.


Clenna received her Bachelor’s of Education from Indiana Wesleyan University located in Marion, Indiana where she majored in Elementary Education with a minor in Science and Psychology. She received her Master’s in Elementary Education with a minor in Science from Fitchburg, Massachusetts. She is licensed in Massachusetts.


She is involved with her family, including 6 grandchildren and a hairy English Cream Golden Retriever. In her few quiet times you can find her reading a novel.


She loves helping children realize they are capable, knowledgeable and hard working individuals.