Bettyapp lecture moments

One search result by its id ("<lecture id>@<second>"), or a lecture by its id or the address of its page: the moment's title, summary, the questions it answers and the teacher's words at its start, its lecture and credit line, and the url that plays from it. Example: id "1000002867@2" returns the moment "What a chain of functions is and the chain rule formula" from Gilbert Strang's "Chains f(g(x)) and the Chain Rule".

Finds what helps a student with one problem from an assignment, an exam or a textbook page: the moments in Bettyapp's lectures that explain it (each with its play_url, lecture title, teacher and credit line), a similar practice question and the open textbook's section. Useful when a student shares a problem, in a photo, a scan or typed. One call covers one question. A problem's symbols match lectures poorly, so topic is what finds the right moments. Bettyapp gives no answer or solution, and the practice question comes without its answer. Typical requests it serves: "can you help with question 3 on my calculus homework", "I'm stuck on this physics problem" with a photo. Example: problem "Evaluate the integral of x e^x dx" with topic "integration by parts" returns MIT 18.01's "Lecture 30: Integration by Parts, Reduction Formulae" from 20:03 and a practice question from an MIT 18.01SC exam.

Finds the moments in Bettyapp's lectures whose meaning is close to the student's question as worded. Useful when the student does not know the topic's name. The moments are related to the question, not necessarily about the same topic; each has its title, summary or excerpt, a play_url that opens the lecture at that moment, the lecture title, teacher and credit line. Typical questions it serves: "why does e to the x stay the same when you differentiate it", "why does salt dissolve in water but oil does not". Example: question "why does e to the x stay the same when you differentiate it" returns MIT 18.01's "Lecture 06: Exponential and Log. Logarithmic Differentiation; Hyperbolic Functions" from 14:08.

One lecture on Bettyapp, by its id (lecture.id in a moment) or the address of its page: its course, teacher, Subjects and Levels, credit line, and every moment in it, in order, each with its play_url. Useful for more of a lecture a moment came from, or for the address of a Bettyapp lecture that a student sends. Example: lecture_id 1000002867 returns Gilbert Strang's "Chains f(g(x)) and the Chain Rule" (MIT RES.18-005 Highlights of Calculus) with its 12 moments.

A topic (photosynthesis, chain rule, supply and demand): the best moment on Bettyapp that explains it at each Level, from school to university, the lowest Level first, then a few more moments and related topics. topic.name is the topic Bettyapp matched, which can differ from the words sent. Useful for an explanation at a particular Level, or an easier or a harder one: "explain it more simply", "is there a university-level explanation". Example: topic "photosynthesis" returns a moment at each Level from Elementary (K–5) to Upper Year University. A topic without a page on Bettyapp returns none, though a search by its words can still find moments.

Every Subject with lectures on Bettyapp, each with its Levels and how many lectures it has, and the Level ladder from Elementary to Graduate & Professional, with each Level's code. Useful for the subject and level values the other tools take, and for what Bettyapp covers. Example: Calculus, Chemistry, Linear Algebra and History are among its Subjects; high_school is the code of High School (9–12).

Finds the textbook chapter a DIKSHA DIAL code names, and the moments in Bettyapp's lectures that explain it. Indian school textbooks (NCERT, CBSE and the state boards) print a code under the QR code on each chapter: 6 letters and digits (L1H1M6), or an NCERT code such as 1064CH01; the QR code's address (https://diksha.gov.in/dial/... or http://epathshala.nic.in/QR/?id=...) works too. It answers the board, medium, class, subject, book and chapter, a source line with its source.url, and the moments for the chapter; or that textbook codes are not available. Example: code "1064CH01" returns NCERT Class 10 Science, chapter "Chemical Reactions and Equations", with moments on balancing chemical equations.

Searches Bettyapp's university and school lectures for the moments that explain a topic or question. Returns results, best first, each with an id, a title and the url that opens the lecture at that moment: fewer details than the full moment search (no summary, teacher or credit line). No results: Bettyapp has no lecture on it. Example: query "chain rule" returns id "1000002867@2", "What a chain of functions is and the chain rule formula — Chains f(g(x)) and the Chain Rule (from 0:02)".

Finds the moments in Bettyapp's university and school lectures where a teacher explains a topic or a student's question, best first, each with a play_url that opens the lecture at that moment, its title, summary or excerpt, the lecture title, teacher and credit line. Useful whenever a student is learning a topic, is lost or stuck, or is doing homework or studying for a test, whether or not lectures or videos come up. Typical questions it serves: "I don't get the chain rule", "we just started eigenvalues in linear algebra and I'm lost", "explain photosynthesis, I have a biology test next week". Example: query "chain rule" returns Gilbert Strang's "Chains f(g(x)) and the Chain Rule" from 0:02, with its play_url and credit line. An empty list means Bettyapp has no lecture on the topic.