Fendodo Prep

Frequently asked questions

Where the questions come from, how the chancing figure is calculated, and what we do not claim.

Last updated: September 2026

Where the questions come from, and how they are made

Are your questions official past papers?

No. Every question is an original item written and compiled by Fendodo itself, and contains no questions, passages or scoring guidelines from any testing organisation. The header of each question-bank file is marked "Fendodo original", and every AP question bank is automatically stamped "Original Fendodo items. NOT College Board material" when it is published.

So when you say "to the official format", what exactly is the same?

What is the same is the shape of the paper, not the questions. The number of questions, the time allowed, the proportion of questions in each domain, the calculator policy, and the task types and mark allocation for free-response items are each checked against the specification documents the testing organisations publish themselves (for example the College Board's Digital SAT Assessment Framework), and then checked again independently by a second reviewer. The content of the questions is always written by us.

Do you use official past papers?

Only to calibrate, never to copy. The cover of an officially released paper states that it is for non-commercial teacher use and may not be resold, so those papers are used only to align unit weightings, difficulty and the structure of the tasks. The first rule in our item-writing guidelines reads: no line of a stem, a data set, a scenario, an answer option or a scoring guideline may be copied.

How are your questions written?

They are written and compiled by Fendodo using its own resources, with some data sets generated programmatically from functions. The questions are based on the specification documents published by the testing organisations, together with the experience our consultants have accumulated from sitting the exams and teaching them, such as which concepts are tested most often and where students most often go wrong. Once a question is finished, a Fendodo consultant proofreads and edits it before it is published.

What is checked before a paper is published?

Besides the consultant's proofread, every paper has to pass an automated structural check before it goes live: whether the number of options and the answer key are within range, whether every question has an explanation, whether question numbers and underline markers correspond one to one, whether the answer distribution favours a particular letter, and whether any stem is repeated across papers.

Does everyone get the same paper? Will I end up doing the same question twice?

It is the same paper, and deliberately so — when you and your teacher talk about "paper 17, question 23", you are talking about the same question. No question is repeated among the 15 papers in a set, so even if you complete all of them you will not meet the same question twice.

Results and reliability

How many points will my score go up if I work through your papers?

We do not give that number, because we have no data to support it. The system holds mock exam results, and it holds official scores entered by students themselves, but the two have never been compared and we have never carried out any correlation analysis. What we can honestly promise is practice with the right shape, that can be repeated, and that can be reviewed question by question once it is done — not a promise about scores.

Were the improvement stories on the home page achieved with your papers?

Yes. Those students were all using the resources on this platform while also receiving one-to-one professional tuition from Fendodo. That kind of progress is produced by long-term planning, teaching and repeated practice together.

Is the score I am given at the end the same as a real exam score?

It is not; it is an estimate, and we say so on every screen that displays a score. The ACT and PSAT conversion tables are checked cell by cell against the scoring guides of the officially released practice papers, and, as in the official reports, PSAT results are presented as a score range rather than a single point. For the SAT we use a curve fitted by hand to the anchor points of official practice papers; it is not true equating.

Are the percentiles on the SSAT/ISEE report a comparison with real test takers?

No; they are our own estimate. SSAT/ISEE scaled scores and percentiles are both produced by a conversion curve of Fendodo's own, unrelated to the norms of the official SSAT or of the ERB, and the score report is also marked "practice estimate, not an official score". Please treat it as a scale for tracking progress, not as an official ranking.

Where does the score range the system gives me come from?

It is a reference range based on your subject, one diagnostic score, your past results and the number of days until the exam. It is not a statistical model; there is no regression and no sample behind it. Please treat it as a rough scale for planning, not as a guarantee of predictive accuracy.

Are there things a mock paper simply cannot do?

There are, and we print them on the paper's own page rather than hiding them in the notes. For example, Unit 5 of AP Business with Personal Finance is not within the scope of the written exam, and Section IIA of the real exam asks about your own project; AP Computer Science Principles does not include the Create project. Wherever a mock paper cannot cover something, we state it plainly on that subject's page.

Chancing analysis

How is the admission probability calculated? Can I see the formula?

You can; there is only one formula: probability = the school's acceptance rate × 1.8((your composite score − 50) / 10). The composite score is a weighted combination of five dimensions: academic record, standardised tests, course rigour, extracurricular activities and background context. A composite score of 50 means you are on a par with that school's median admitted student, and at that point the probability is simply equal to the school's own acceptance rate. The final probability is held between 1% and 95%.

Where does the school data come from? How often is it updated?

Acceptance rates and SAT quartiles come from the US Department of Education's College Scorecard. The weight of each dimension is adjusted school by school according to the importance of each review factor as the school itself reports it in Common Data Set §C7; where a school does not publish this, admissions survey data are used. Schools are ordered by QS ranking. These data are updated in real time every day.

Which numbers are official, and which are your estimates?

The acceptance rate and the median SAT (where the school officially publishes quartiles) are real values. For most schools the median GPA and the English test threshold are estimates derived from the acceptance rate, not figures published by the schools.

Do your student cases push my admission probability up?

They do not, and it is deliberately designed that way. Students who are admitted report back, while students who are rejected often do not, so a rate calculated on that basis would be severely overstated. The cases therefore show only "where Fendodo students have applied", and play no part at all in the probability calculation.

How accurate is this chancing analysis? Has it been validated?

We do not give an accuracy figure. Chancing is a reference estimate for planning a school list; it is not a prediction, and it does not constitute any promise of admission.

Does the same logic apply to applications to the UK or Hong Kong?

It does not. The Common Data Set and IPEDS are US disclosure systems, and applying them to other markets distorts the picture. The UK, Canada, Australia, Hong Kong and Singapore each have their own set of weights, reflecting the systems as they actually are, in which predicted grades and public examinations dominate and the SAT is barely taken into account.

Purchase, validity period and refunds

The validity period is 3 months. What happens when it expires?

Expiry only stops new papers being opened. Your account and your score reports are still there, and you can log in and view them at any time. Buying any further paper opens another 3 months, and it will not shorten the validity period you already have left.

Can I get a refund?

Yes. You may notify us at any time that you are terminating the contract, we may not refuse, and we will settle and refund the portion not yet provided on a pro rata basis; papers that have been opened and are available for use are treated as provided. Please make your request through our customer service LINE account or at [email protected], quoting your order number. The full terms are in the Terms of Purchase.

Why are there three boxes to tick at checkout?

Because the second box cannot lawfully be mixed in with anything else. Digital content is made available immediately after payment, and the seven-day right of withdrawal therefore no longer applies by law — this is something you must agree to separately and explicitly, rather than have it buried inside a single "I agree to the terms". The third box covers age and parental consent. We would rather ask one time too many.

Can someone under 18 buy on their own?

No; the consent of a legal representative is required. Since 2023 the age of majority under the Civil Code (民法) has been 18, and a purchase contract made without the consent of a legal representative has no effect. We will ask you to confirm this at checkout. If a parent finds that their child has completed a purchase without consent, please contact us and we will deal with it.

Data and privacy

Do you store my credit card number?

No. Card payment is completed on ECPay's (綠界科技) own pages. We receive only the authorisation result and the last four digits of the card number; the full card number neither passes through nor is stored in Fendodo's systems.

Where are my answers and recordings sent?

Automated marking of writing and speaking sends the content of your answers to a cloud service provider located in the United States for processing. Some speaking tests use the speech recognition built into the browser, and that feature transmits the audio to the browser vendor. The full list of what is collected, who it is shared with, and your rights to enquire, correct and delete, are set out in the Personal Data Protection Notice.

Where is the data I enter in the free consultation form sent?

To Fendodo's own system. The student's name or nickname, year group, countries of interest, who is filling in the form, and the mobile number or email address you leave are stored, and our customer-service mailbox is notified by email so that a consultant can contact you and arrange the consultation; our internal operations system can also see the list. The data is used only for this consultation and any follow-up service, and is not given to anyone else. See sections 2 and 3 of the Privacy Notice.

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