- Sully Elementary School
- Meet the Team
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Welcome to 4th grade at Sully Elementary! We are excited to have you join us! Be prepared to advance your skills in Math through hands on acivities. We look forward to reading exciting books with you and helping you write your own amazing stories. We will be digging deep into Virginia history and will be exploring plants, animals, oceans and the Solar System. Please feel free to contact us with any questions that you might have. The best way to reach the 4th grade teachers during the school year is to call the school at (571) 434-4570, email us, or message us on Class Dojo. Our email addresses can be found below along with a little about ourselves!
Meet the 4th Grade Team

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Mr. Sergio D'Onofrio
Hello and welcome to 4th Grade at Sully Elementary School. My name is Sergio D’Onofrio and this will be my eighth year teaching fourth grade as a Sully Hornet. Before I relocated to Loudoun County I previously taught in Florida after moving there from Richmond, Virginia. I earned both my Bachelors and Master’s Degree from Virginia Commonwealth University. I am excited to be your student’s teacher and look forward to working with you to make this the best possible year for your child. Feel free to email me or call the school if you have any questions or concerns.

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Ms. Erica Forstner
Hi! I'm Erica Forstner and I am so happy to have joined the Sully Family. This is my 3rd year teaching 4th grade. I first came to Virginia from Connecticut to attend Old Dominion University where I earned my bachelor's degree in Elementary Education. I then went back to Connecticut and taught for a few years at a Montessori school where I also received my Montessori certification. I recently moved to Virginia and am looking forward to a great school year!
Meet the English Learner (EL) Teachers
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Students who do not speak English as a first language are referred to as English Learners (ELs). EL students will work in their classroom with one of the EL teachers throughout their day! Please read below to meet our EL teachers!
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Mrs. Maggie Mansfield
Hi there,
My name is Mrs Mansfield and this is my 21st year teaching! I taught in Fairfax county for 14 years and came to Sully 8 years ago. I grew up in Loudoun County and went to Rolling Ridge as an elementary school student. I graduated from Broad Run High School so I have seen the county go through a lot of growth. I am so happy to be at Sully and love teaching my El students. My son Gary attends Sully as well and he will be a 5th grader next year. I am the president of the Sully PTO and love meeting all our families during our events and activities. I enjoy riding horses and spending time with my two kids Lily and Gary and my husband Leon! I look forward to another great year at Sully!
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Ms. Tracey Moran
I have been a Sully Hornet for 17 years, teaching all levels of EL. For the last 7 years I have been a part of the 4th grade team. I received my B.A. in Foreign Affairs and Spanish from the University of Virginia and my M.ed. in Bilingual/Multicultural education from George Mason. In addition to teaching I have written books and resources to help students learn VA Studies, Math and Economics.