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Most families discover fairly quickly that there’s no single application portal for boarding school applications. Different schools use different platforms, and the system a school uses affects more than just submission of documents. It shapes how many essays you write, how recommendation letters get submitted, and how much time you actually need before the first deadline.
Understanding the systems before you contact a single teacher or write a single word is time well spent. Here’s a complete breakdown of how SAO, Gateway, and Ravenna work, what recommendation letters each one requires, and how to choose the right recommenders for your student.
Why the Application System Matters
There are two centralized application platforms used by most boarding schools: the Standard Application Online (SAO) and Gateway to Prep Schools. Some schools use Ravenna, and a handful maintain their own independent portals entirely.The system a school uses has three major implications for your application strategy:
Essay workload
SAO uses a single essay submitted to every school you apply to. Meanwhile, Gateway requires custom essays for each school individually. If your target list includes many Gateway schools, start your timeline earlier to accommodate them.
Recommendation letter logistics
Each system handles recommendations differently. Understanding the mechanics before you ask a teacher to write anything prevents avoidable confusion and last-minute scrambles.
Timeline and coordination
Some systems are already open for the 2026-2027 application cycle. Gateway to Prep Schools has launched its current application portal, and SAO is open for Fall 2027 enrollment. Registering accounts early gives you ample time to review each school’s specific requirements before the fall rush begins.
How It Works
The SAO is managed by the Enrollment Management Association (EMA) and is the most common application platform for K-12 independent schools nationwide. It allows families to submit a single application to multiple participating schools without re-entering information for each one.
The shared profile covers your student’s academic history, family background, extracurricular activities, and awards. One common student essay and one parent statement serve all your SAO schools simultaneously. Some schools require additional supplemental essays alongside the common ones, but the shared foundation eliminates significant duplicate work.
Both SAO and Gateway also allow students to upload video introductions and creative portfolios. Before submitting anything, ensure that every link is functional and accessible to the schools.
Recommendation Letter Requirements
| Type | Status | Notes |
| Math Teacher | Required | Current year teacher; must have known the student for at least 3 months in the current grade |
| English Teacher | Required | Current year teacher; must have known the student for at least 3 months in the current grade |
| Principal/Counselor | Required | Covers character, conduct, and overall school performance |
| Any Teacher Recommendation | Optional | Any current teacher outside math and English |
| Personal Recommendation | Optional | Non-academic recommender |
The key advantage: Once a teacher completes their SAO recommendation form, that letter is distributed to every SAO school on your list simultaneously. Teachers only fill out the form once regardless of how many schools you’re applying to, significantly reducing the burden on recommenders.
The SAO’s official guidelines mandate that recommenders must be current-year teachers who have known the student for at least three months in the current grade. If a student recently transferred or switched teachers, this threshold needs to be confirmed before reaching out.
How It Works
Gateway is the platform used by many of the most selective boarding schools in the country, including Phillips Academy Andover, Phillips Exeter Academy, Groton, Deerfield, The Hotchkiss School, The Lawrenceville School, among others. Gateway currently serves 64 member schools, with individual schools setting their own deadlines and requirements.
After creating an account and adding target schools to your list, the platform’s Part 3 lists every form required by each specific school. Other resources may be found here. This is the most reliable way to confirm the requirements, as they vary between institutions even within the same system.
The critical difference between Gateway and SAO is that Gateway schools each publish their own essay prompts, and every application requires a custom response written specifically for that school. Hence, Gateway is more writing-intensive and rewards families who start early and research each school’s specific culture before drafting anything.
Recommendation Letter Requirements
| Type | Status | Notes |
| Current English Teacher | Required | Must be current year |
| Current Math Teacher | Required | Must be current year |
| Principal/Counselor | Required | Character, conduct, overall performance |
| Personal Recommendation | Optional | Non-academic, course-outside perspective |
| Special Interest Recommendation | Optional | Coach, arts instructor, activity supervisor |
| Third Academic Subject Teacher | School-specific | Marked “Only for This School” — not shared |
An important distinction: Standard forms with the same name are shared across all your Gateway schools, meaning a teacher fills them out once. However, some schools design their own supplemental recommendation forms that are school-specific and cannot be shared. These are clearly labeled “Only for This School” in the system. These require separate submissions and must be handled individually with careful discernment.
How It Works
Ravenna functions differently from SAO and Gateway. Rather than being a consortium application, it’s an admissions management platform that individual schools use to run their own processes.
Some schools, particularly day schools and boarding schools with lower residential enrollment, use Ravenna as their primary application portal. Some schools that accept the SAO still require all applicants to create a Ravenna account because admissions decisions are released exclusively through Ravenna. If this applies to any of your target schools, creating the account is not optional, even if you submitted your actual application through SAO. Always check the instructions provided by each school’s admissions.
Recommendation Letter Requirements
| Type | Status | Notes |
| Current English Teacher | Required | School-specific form |
| Current Math Teacher | Required | School-specific form |
| School Report/Recommendation | Required | Written by principal, counselor, or placement advisor |
| Personal Recommendation | Optional | Varies by school |
| Special Interest Recommendation | Optional | Varies by school |
| Classroom Teacher Recommendation | Optional at some schools | Any current teacher; replaces fixed subject requirement at select schools |
SAO and Gateway both support direct transcript uploads through the platform. However, Ravenna requires the student’s current school to have its own Ravenna account to upload electronically. Most schools don’t have this, which means transcripts typically need to be emailed directly from the student’s current school to each target institution. Once received, the school marks the transcript as complete in Ravenna’s checklist. Families should confirm receipt to verify submission with confidence.
In Ravenna, recommendation invitations are sent by adding the recommending teacher as a “Delegate” within the system. This differs from SAO and Gateway’s invitation workflows, so the interface may be unfamiliar to teachers who have submitted recommendations for other students through those typical platforms.
School-Specific Portals
A small number of schools operate entirely outside the three common platforms. Buckingham Browne & Nichols (BB&N) in Massachusetts and Harvard-Westlake School in California are examples of well-known schools that use their own independent application systems. These schools require students to create a separate account and submit all materials directly through the school’s portal.
For these schools, recommendation letter format and submission mechanics must be confirmed directly on the school’s admissions website. Don’t assume the requirements mirror what you’ve already navigated on SAO or Gateway.
Choosing the Right Recommendation Teacher
With the logistics of each system understood, the more important question is who should actually write the letters.
Required Recommendations: Math and English Teachers
Both math and English teacher recommendations must come from current-year teachers. If a student has changed teachers mid-year or recently transferred, the teacher most familiar with the student must write a substantive, specific letter. A general letter from a teacher who barely knows the student is worse than a strong letter from someone who has observed them closely over months.
When choosing between two possible candidates for the same subject, consider who has the clearest picture of the student’s recent growth, not just their best grade or highest-performing period. Quality of the student’s characterization must be prioritized. An admissions officer reading hundreds of letters is far more engaged by specific observations, “she asked a question in October that reframed how the whole class understood the chapter,” than by adjectives, “a brilliant and dedicated student.”
The Principal/Counselor Recommendation
This letter primarily addresses the student’s character, conduct, and overall record at their current school. If the student attends a school without a dedicated counselor, this responsibility commonly falls to a homeroom teacher, class advisor, year-level coordinator, or the person in the school’s administration who knows the student’s full record best.
Identify your target recommender early. At schools without a formal counselor role, confirming who will write this letter and whether they have the information they need to do it well takes more coordination than simply emailing a request.
Optional Recommendations: When and Who
Supplemental recommendation letters, whether personal recommendations, special interest letters, or third-subject academic recommendations, are optional in most cases. That word “optional” is meaningful: a strong supplemental letter genuinely strengthens an application by adding a dimension that academic letters can’t capture. A weak or generic one adds nothing.
The best supplemental recommenders are adults who know the student’s character and can write such characterization concretely. A lacrosse coach who has seen a student lead a team through a difficult season, an art teacher who watched a student develop a genuine creative voice over two years, a research mentor who can describe how the student approaches problems — these letters do real work in an application.
The worst supplemental recommenders are adults selected based on title or perceived prestige who don’t actually have specific observations to share. An executive or family friend who barely knows the student writing about their “exceptional character” is transparent to an experienced admissions officer and should be avoided. Prestige is fruitless in such cases.
For students whose grades are average but whose growth in a particular subject has been significant, the teacher who witnessed that growth is generally the stronger choice over the one who gave higher grades. For students who are quieter in the classroom but come alive in athletics or the arts, a coach or artistic director who has seen that dimension of the student is often the most valuable voice in the entire application file.
A Practical Action Plan
Step 1: Map your target schools to their systems. Before seeking recommenders, build a school list and note which application system it uses. Look into additional requirements such as Ravenna accounts for decision notifications even if you’re applying through SAO.
Step 2: Log into each system and pull the specific requirements. Don’t rely on general knowledge. Each system’s portal lists exactly which forms are required, which are optional, and which are school-specific. Pay particular attention to Gateway’s “Only for This School” labels.
Step 3: Identify your recommenders before reaching out. Map each form to a specific person before sending any invitations. Confirm that the people you’re considering actually meet the eligibility requirements, particularly the three-month minimum for SAO.
Step 4: Have a conversation before sending a system invitation. Ask the teacher directly, in person or by email, whether they’re willing and able to write a strong letter. Give them the number of schools, the deadlines, and a summary of the student’s activities and goals. Teachers who have full context write better letters than those uninformed of the student’s details and goals.
Step 5: Send materials to support the recommender. Once a teacher agrees, provide a brief written summary of the student’s key activities, any relevant accomplishments, and the qualities you hope the letter can reflect. This isn’t spoon-feeding what to write — it’s providing the context to write something specific and useful.
Step 6: Build in buffer time. Teachers have many responsibilities beyond writing recommendation letters. Giving them four to six weeks is respectful and practical. Starting this process is best done before the school year is in full swing.
Recommendation letters are the one part of a boarding school application that the student and family can’t write themselves. That’s exactly what makes them valuable: an admissions officer trusts them to provide an objective, specific perspective that no other document can. Treating them strategically, choosing the right people, giving them the right support, and starting early enough to do it well is one of the highest-return investments a family can make in the application process.
If you’d like help mapping your target school list to the right application systems, identifying the strongest recommenders for your student’s profile, or preparing for the full boarding school application process, our team at Ivy Talent Education is here to help. Reach out to schedule a consultation and get personalized guidance for the application season ahead.
