How we work together.

1. Plans and billing

• Plans are monthly. You’re billed through Stripe on the same date each month. Every plan follows the same project path; the plan sets how many sessions you get, and so how fast your student moves through it.
• Sessions per plan:
  • Online Private Engineering Starter: 2 × 60-minute sessions a month ($249/month)
  • Online Private Engineering Core: 4 × 60-minute sessions a month ($449/month)
  • In-Home Engineering: 4 × 60-minute sessions a month ($749/month)
  • Private Engineering Mentorship: Up to 8 instructional hours a month ($1,250/month)
• Changing plans: move up or down any time. The new plan starts on your next billing date.
• Cancelling a plan: cancel any time before your next billing date and you won’t be charged again. Sessions already paid for can still be used until the end of that billing month.

2. Scheduling and sessions

• Sessions are 60 minutes, one on one.
• Where: online anywhere, or in person at your home or at a public library near you, within 50 miles of Boston. For library sessions we reserve a study room when one is available. If the library is booked, we’ll suggest another branch or your home.
• Regular times: most families keep a regular weekly or every-other-week slot, which stays yours as long as your plan is active.

3. Rescheduling and cancelling a session

Free to reschedule Counts as used No-show

24 hours before Session time

4. Unused sessions

• Sessions are planned to be used within their billing month.
• Up to 1 unused session can roll into the next month. Others expire at the end of the billing month.
• Sessions we cancel never expire: they always carry over until they’re made up.
• Leftover sessions don’t carry over after a plan is cancelled.

5. Late arrivals, weather and emergencies

• If a student joins late, the session still ends on time so the next family isn’t kept waiting.
• We wait 15 minutes. After that, with no word from you, the session counts as a no-show.
• Online: if the connection drops on our side, we make up the lost time.
• Bad weather: when roads aren’t safe (for example, when your town’s public schools close for snow), in-person sessions move online at the same time, or we reschedule. Either way, no charge. We’ll message you at least 2 hours before.
• Emergencies on either side are handled case by case, with no charge. Just let us know.

6. Holidays and time away

We’re closed on these days. A session that falls on one is moved to another day that month, with no need to ask.

Closed	When
New Year’s Day	January 1
Martin Luther King Jr. Day	3rd Monday in January
Presidents’ Day	3rd Monday in February
Patriots’ Day	3rd Monday in April
Memorial Day	Last Monday in May
Juneteenth	June 19
Independence Day	July 4
Labor Day	1st Monday in September
Indigenous Peoples’ Day	2nd Monday in October
Veterans Day	November 11
Thanksgiving	4th Thursday in November, and the Friday after
Winter break	December 24 – January 1

• School vacation weeks (February and April): we’re open, and they’re a great time for extra sessions.
• Going away? Email us at least a week ahead and we can pause billing for up to 1 month a year. Your regular time is held while you’re away.
• Our time off is posted here and emailed to you at least two weeks ahead. Sessions it affects are rescheduled or carried over.

7. The trial lesson

• The Trial Engineering Lesson is $75 for 60 minutes, online or in person. One trial per family.
• It can be rescheduled under the same 24 hours rule as any session.
• There’s no obligation to continue afterward.

8. Refunds

• Monthly plan payments aren’t refunded once the billing month has started, since that time is reserved for your student. You can cancel any time before the next billing date.
• Sessions we cancel and can’t make up are refunded at your plan’s per-session rate (the monthly price divided by the sessions in your plan).
• Refunds go back to the card you paid with, usually within 7 business days.

9. Materials and projects

• Materials are included in every plan. Students keep everything they build.
• For online plans, we ship each project’s parts and printed components before the session that needs them.
• Parts that arrive broken or missing are replaced free.
• Materials already delivered stay with the student if a plan is cancelled.

10. Safety, supervision and privacy

• In-person sessions: a parent or guardian (18+) stays at home, or in the library building, for the whole session.
• Library sessions: we follow each library’s rules and leave the room as we found it.
• Online sessions: for students under 13, a parent or guardian stays nearby and joins the first few minutes.
• Projects are low-voltage. We never work with mains electricity. Soldering and 3D printing only happen with a parent’s OK and proper supervision.
• Photos and video: we never record sessions or share photos of students without your written permission.
• Your information is used only to run sessions and billing. We never sell or share it.

11. Schools and partner locations

Group classes held at partner schools and learning centers follow that location’s own enrollment, holiday and refund policies, since families enroll through them. School partnerships are covered by their own written agreement.