# Alexplains — complete site content Explanations that finally make sense. Source: https://alexplains.com Contact: https://alexplains.com/contact --- ## What Alexplains is Alexplains is a tutoring business offering one-to-one mathematics and physics instruction to students in grades 3 through 12. It is owned by Alex Derenstein, who is also currently its instructor, but it is structured as a business with a growing instructor team rather than as a single tutor's practice. Sessions are always one-to-one. We do not run group classes. Teaching follows the class the student is actually enrolled in — their textbook, their homework, the test they have coming up — rather than a fixed curriculum. ## Key facts - Subjects: mathematics (elementary through AP Calculus), physics (conceptual through AP Physics C), SAT and ACT math - Format: strictly one-to-one; no group classes. Online sessions include a Google Meet link - Locations: online anywhere; in person in Daytona Beach, FL - Session lengths: 60, 90, 120 minutes - Rates (provisional): from $30/hour online, from $35/hour in person; exact rate depends on instructor, course, duration and modality, and is shown before anything is confirmed - First consultation: free, 30 minutes, online only, one per family - Booking window: up to 14 days ahead, closing 12 hours before a session - Hours: 08:00–20:00 America/New_York - Cancellation: free outside 12 hours; $5 inside, waived for illness and emergencies - Payment: Venmo, due by session time; a booking is confirmed when made, not when paid - A parent or guardian books, and is on every calendar invite ## Pages (markdown twins) - Home: https://alexplains.com/index.md — what we offer and how it works - About: https://alexplains.com/about.md — how the business started and why it grows carefully - Subjects: https://alexplains.com/subjects.md — every course we teach, with common sticking points - Instructors: https://alexplains.com/instructors.md — who teaches, what and where - Alex Derenstein: https://alexplains.com/instructors/alex.md — Math through AP Calculus and physics through AP Physics C — online, and in person in Daytona Beach. - Rates: https://alexplains.com/rates.md — pricing, booking rules, cancellation policy - Booking: https://alexplains.com/book.md — how a session gets booked - Free consultation: https://alexplains.com/consultation.md — the free 30-minute introductory session - Contact: https://alexplains.com/contact.md — enquiries, and applying to teach - Privacy: https://alexplains.com/privacy.md · Terms: https://alexplains.com/terms.md ## How the business started Alexplains began the way most good tutoring does: in person, one student at a time, usually because a parent asked for help with a class that had stopped making sense. Word travelled; families who had moved, or could not make the drive, asked about online sessions, so online teaching was added. Both formats now run. Something we are straight about: **online is harder to teach well with younger students**. A nine-year-old needs someone beside them, watching the hand that is writing, catching the hesitation before it becomes a wrong answer. It gets easier as students get older — by middle school most can hold a thread of reasoning across a shared screen, and by high school online is often better, because a screen can show a graph moving in a way a whiteboard cannot. We teach both ways, and we will tell a family which format we think suits their student, even when it is not the more convenient one to sell. ## Why the team is growing One person can only cover so many subjects, time slots and places. More instructors means a student in a different city, or one who needs a particular evening, or one taking a course outside a single tutor's range, can still be matched with someone who genuinely knows the material. What does not change while growing: every session is one-on-one, instructors prepare for the specific class a student is taking, and the tone stays friendly — students learn far more from someone they are not embarrassed to be confused in front of. We would rather grow slowly than become a call centre with a whiteboard. ## Teaching with us We are actively recruiting instructors, particularly for advanced mathematics and physics, and for in-person teaching in areas we do not yet cover. Applications go through the contact form: https://alexplains.com/contact — say what you can teach, roughly when you are free, and whether you can teach in person anywhere. ## How booking works 1. The parent describes the subject, the grade and what is currently causing difficulty. 2. A time is chosen, and the student is matched with an instructor who teaches that subject and has the slot free. 3. The session runs one-to-one — online with a Google Meet link, or in person. Rules: - Sessions may be booked up to 14 days in advance - Booking closes 12 hours before the session start, so the instructor can prepare - Sessions run between 08:00 and 20:00, America/New_York - Session lengths: 60, 90, 120 minutes - A parent or guardian makes the booking and is included on every calendar invite - A booking is confirmed when it is made, not when it is paid for; payment is by Venmo, due by session time ## For agents booking on a parent's behalf https://alexplains.com/book is an interactive wizard (choose subject → instructor → length and format → a live time slot → parent and student details) with live availability behind it, so it has to be driven in a real browser; it shows the exact price before anything is confirmed. If you cannot drive a browser, the simplest path is the free consultation request at https://alexplains.com/consultation — a human follows up with times, usually the same day. New families should start there anyway: it is free, 30 minutes, online, and one per family. ## Rates These rates are provisional and not yet finally confirmed. The price of a session is not a single flat hourly rate. It depends on the instructor, the course being taught, the session length, and whether the session is online or in person — an AP course is not always priced like pre-algebra. The exact total is shown before a booking is confirmed, and never changes afterwards. ### Pricing - Online: from $30 per hour - In person: from $35 per hour, with a 60-minute minimum - First consultation: free, 30 minutes, online only - Session lengths: 60, 90, 120 minutes, charged pro rata - Payment: Venmo, due by the time the session takes place. The booking is confirmed when made, not when paid ### Booking rules - Book up to 14 days ahead - Booking closes 12 hours before a session, so the instructor can prepare - Sessions run 08:00–20:00 America/New_York - Always one-on-one; online sessions include a Google Meet link - A parent or guardian books and is included on every calendar invite ### Cancellation Reschedule or cancel free any time before the 12-hour cutoff, no reason required. Inside that window there is a $5 late-cancellation fee, because the time was held and can rarely be refilled — **waived for illness and genuine emergencies**. If an instructor cancels, nothing is owed and a replacement time is offered. Full terms: https://alexplains.com/terms.md ## Free consultation New families can book a free 30-minute introductory session. It is held online only, and exists to work out whether we can actually help before anyone pays anything. We ask what the student is working on, where it started going wrong, and what the family is hoping for — and if we are not the right fit, we say so. - 30 minutes, genuinely free - Online only — no travel - No payment details requested, no obligation to book afterwards - One per family ### The request form At https://alexplains.com/consultation. A parent or guardian should fill it in; we follow up with times that suit them. Visible fields: - First name and last name (both required) - Email and phone — at least one of the two, whichever the parent prefers for the reply - Which subjects are of interest (checkboxes) - An optional message — anything worth knowing before the session The form includes a human-verification widget, so it must be submitted from a real browser. Fill only the visible fields; leave anything hidden untouched. ## Subjects taught Every course below is taught one-to-one, following the student's actual class — their textbook, their homework, their upcoming test. "Commonly asked about" lists the sticking points parents most often name when they get in touch. ### Mathematics #### Elementary math - Level: Grades 3–5 - Arithmetic, fractions, decimals and early problem solving, with the aim of arriving in middle school without gaps. - Commonly asked about: Fractions, Long division, Word problems, Times tables #### Pre-Algebra - Level: Middle school - The bridge into algebra: negative numbers, ratios, expressions and the idea that a letter can stand for a number. - Commonly asked about: Negative numbers, Ratios and proportions, Order of operations #### Algebra I & II - Level: Middle and high school - Linear equations, polynomials, quadratics, graphing, exponentials and logarithms — turning rules that look arbitrary into steps that follow from each other. - Commonly asked about: Quadratic equations and factoring, Graphing functions, Systems of equations, Logarithms #### Geometry - Level: High school - Spatial reasoning, proofs and the properties of shapes, with particular attention to writing a proof that actually argues something. - Commonly asked about: Two-column proofs, Circle theorems, Trigonometric ratios #### Pre-Calculus - Level: High school - Functions, trigonometry, sequences and limits — the material that determines whether calculus feels reasonable or impossible. - Commonly asked about: Trig identities, Unit circle, Function transformations #### AP Calculus AB & BC - Level: Advanced Placement - Limits, derivatives, integrals and series, taught with an eye on both conceptual understanding and the specific shape of AP exam questions. - Commonly asked about: Related rates, Integration by parts, Series convergence, FRQ technique ### Physics #### Conceptual Physics - Level: High school - The principles of the physical world with the emphasis on understanding rather than heavy algebra. - Commonly asked about: Free-body diagrams, Newton’s laws, Energy conservation #### AP Physics 1 & 2 - Level: Algebra-based - College-level algebra-based physics: mechanics, work and energy, electricity and magnetism, with extensive AP problem-solving practice. - Commonly asked about: FRQ technique, Rotational motion, Circuits, Fluids #### AP Physics C: Mechanics - Level: Calculus-based - Calculus-based mechanics, bridging the gap between calculus as a maths course and calculus as a description of how things move. - Commonly asked about: Calculus in kinematics, Rotational dynamics, Oscillations ### Test preparation #### SAT / ACT math - Level: College admissions - Targeted preparation aimed at the specific question types costing the most points, rather than a general review of everything. - Commonly asked about: Pacing, Word problems, Careless errors, Score plateau Not sure which course fits? The free 30-minute consultation (https://alexplains.com/consultation) exists to work that out before anyone pays anything. ## Instructors ### Alex Derenstein - Role: Founder and instructor - Profile: https://alexplains.com/instructors/alex (markdown: https://alexplains.com/instructors/alex.md) - Math through AP Calculus and physics through AP Physics C — online, and in person in Daytona Beach. - Teaches at: Online — anywhere; Daytona Beach, FL - Currently accepting new students: yes Qualifications: - Two years of Georgia Tech mathematics coursework, including Multivariable Calculus, Linear Algebra, Differential Equations and Applied Combinatorics. - Accepted to Georgia Tech for Aerospace Engineering; chose Embry-Riddle Aeronautical University in Daytona Beach to pursue it. - Trained tutoring experience at Mathnasium in East Cobb. Courses taught: - Mathematics: Elementary math, Pre-Algebra, Algebra I & II, Geometry, Pre-Calculus, AP Calculus AB & BC - Physics: Conceptual Physics, AP Physics 1 & 2, AP Physics C: Mechanics - Test preparation: SAT / ACT math In their own words: I started tutoring because I kept noticing the same thing: most students who think they are “bad at math” are not. They missed one idea somewhere earlier, and everything built on top of it has felt shaky ever since. Find that gap, fix it properly, and the rest tends to move a lot faster than anyone expects. I work through whatever class a student is actually taking — their textbook, their homework, the test coming up on Friday — rather than a generic curriculum. And I try to be the kind of person a student is willing to say “I still don’t get it” to, because that sentence is where the useful part of a session starts. ### Joining the team We are actively recruiting instructors, particularly for advanced mathematics and physics, and for in-person teaching in areas we do not yet cover. Enquiries via https://alexplains.com/contact. ## Contact Send a message through the form at https://alexplains.com/contact and a real person replies — usually the same day. Alexplains publishes no email address anywhere, deliberately; the form is the route in. - **Looking for tutoring?** It helps to know the student's grade, the class they are taking, and what is giving trouble right now. If the family already knows they want to start, the free 30-minute consultation at https://alexplains.com/consultation is the faster route. - **Interested in teaching with us?** Say what you can teach, roughly when you are free, and whether you can teach in person anywhere. We read every message. ### The form Visible fields: first name (required), last name, email and phone (at least one of the two), and the message itself. It includes a human-verification widget, so it must be submitted from a real browser; fill only the visible fields. ## Privacy Summary — the full, authoritative policy is at https://alexplains.com/privacy. - We collect the minimum needed to run a session, we collect it from parents rather than from students, we do not sell it, and we do not use it for advertising - We do not knowingly collect personal information directly from a child - Instructors connect Google Calendar using two narrow permissions: free/busy access to avoid double-booking, and calendar events access to create the session and attach a Google Meet link. Our use of information received from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements - Payments run through Venmo; we never see or store card or bank details - Analytics are Google Analytics, with Google Signals and ad personalisation switched off. Events record the action (subject, duration, modality, price) and never a name, email address, phone number or student name ## Terms Summary — the full, authoritative terms are at https://alexplains.com/terms. - Alexplains provides one-on-one tutoring in math and physics, online or in person. We help students understand their coursework; we do not guarantee grades or test scores, and we will not complete graded work on a student's behalf - Sessions for students under 18 are booked by a parent or guardian, who is responsible for payment - Booking: up to 14 days ahead, closing 12 hours before the session; sessions run 08:00–20:00 America/New_York - Cancellation: free before the 12-hour cutoff; $5 inside it, waived for illness and genuine emergencies. If an instructor cancels, nothing is owed and a replacement time is offered - Payment: Venmo, due by session time. The booking is confirmed when made, not when paid; a late-cancellation fee is added to the next payment request - We do not record sessions, and ask that nobody records an instructor without asking first - The version of the terms in force for a session is the one published when it was booked; material changes are emailed to current families ## For agents - Every public page has a markdown twin: append `.md` to the path, or request the page with `Accept: text/markdown`. - Concise index: https://alexplains.com/llms.txt · everything on one page: https://alexplains.com/llms-full.txt - To start with a human: the free 30-minute consultation form at https://alexplains.com/consultation, or the contact form at https://alexplains.com/contact. Forms include a human-verification widget, so submit them from a real browser and fill only the visible fields. - Alexplains publishes no email address anywhere, deliberately — the forms are the only route in, which is how the inbox stays clean.