Achieve, LLC
Bonnie Leaf, M.A. Special Education
Shelley Karpel, Licensed Clinical Social Worker
Serving Boulder, Colorado and the North Denver Metro area
Access to 
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Helping children, adolescents and young adults with ADHD achieve their potential through executive function skill coaching while supporting parents in the process.
Shelley Karpel,
Licensed Clinical
Social Worker
Bonnie Leaf,
M.A. Special Education

Shelley has been a Licensed Clinical Social Worker for over 30 years.  She co-founded Access to Achieve with Bonnie after developing and successfully implementing executive function strategies for her son with ADHD.  She worked through the school system to get his needs met.  Shelley wanted to help others and now works with students and families as an Executive Function Coach and Case Manager.  She builds skills and implements personalized compensation strategies for students at school and at home. Shelley shares this knowledge and methodology with other team members through teaching and supervision and speaks on Executive Function topics.

Executive Function Coaches

After retiring from her 30 year career as a Special Education Teacher at both the elementary and secondary levels, Bonnie co-founded Access to Achieve with Shelley so she could continue her passion to help families.  She works as an Executive Function Coach, Interventionist, and Liason, helping students K-12 and their parents develop and implement strategies that support learning and work production in school and at home.  Bonnie supervises and shares her methodology weekly with the team of coaches and presents on Executive Function. She has traveled the complex journey of diagnosis, intervention and support with her family. 
Terry Snyder,
M.A. Special Education

Terry is a retired Boulder Valley School District Special Education Teacher and works as an Executive Function Coach and Liason. She has successfully worked with families and kids with Autism, Asperger's, Learning and/or Emotional Difficulties, and Twice Exceptional students of all ages.  Terry enjoys helping develop executive function skills and has great fervor for her work. Terry has lived with and supported people with ADHD most of her life, which is why she chose her career in special ed.  Both her brother and son were identified with ADHD by second grade.

Sarah Kauffman,

Licensed School Psychologist, Teacher


Sarah taught High School Social Studies for 28 years.  In graduate school, she pursued her dream to assist individual students who struggle at school, becoming a Licensed School Psychologist over 25 years ago.  After retiring from the classroom, she worked as a school psychologist with K-12 students, developing IEPs, facilitating small socioemotional groups, and consulting with teachers.  Sarah's particular interest lies in coaching students to choose new strategies that help prefrontal brain systems manage behavior and use executive skills effectively.

Donna Werner,
M.A. Special Education


Donna worked as a Special Education Teacher K-12, as well as a Cognitive Retrainer for traumatically injured adolescents and adults for over 20 years.  She is excited to apply this variety of experiences and skills to work with students to maximize their executive functioning developments and increase their achievement at school and home.  Donna's interest and passion for supporting families also includes her volunteer work with the I Have A Dream Foundation, tutoring at the middle and hi
gh school level mentoring students and helping their families to navigate academic challenges.

Kat Bonfiglio,
M.A. Special Education

Kat brings 20 years of teaching experience to Access to Achieve.  Earning a Master's Degree in Specific Learning Disabilities has afforded her the opportunity to work with students K-12.  Having conducted many professional development workshops for educators, Kat has learned that teachers truly want tools to guide their students.  She is a self-proclaimed life-long learner who is passionate about teaching students and their families about ADHD, Autism, Asperger's Syndrome, Emotional Disabilities and Executive Function Skills.

Amy Mandlowitz,
Certified Professional Educator
with a specialization in Gifted Education

Amy has worked in education for almost twenty years in both public and private schools.  As an elementary teacher specializing in instruction for the gifted and talented, Amy developed an expertise in supporting the asynchronous development of the twice-exceptional child.  Her warm caring nature allowed students to feel safe taking risks, both academically and emotionally.  She encourages students' explorations of their own learning styles in determining instructional strategy.

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