Expert TA Introduction to Symbolic Questions
Summary
TLDRThe video script is an instructional guide for using the Expert TA system, focusing on symbolic expression questions in physics assignments. It highlights the system's user-friendly interface, which includes a palette of necessary variables and functions, and safeguards against syntax errors. The script emphasizes the availability of hints and personalized feedback to aid learning, and reassures students that the system is designed to be forgiving of minor input errors. It also discusses the system's use of data mining and machine learning to improve feedback over time.
Takeaways
- 👨🏫 The video provides an overview of the class management page and discusses how instructors handle deductions related to submission attempts, axes, hints, feedback, and late work.
- ⏰ It's a reminder to students to contact their instructor for any questions regarding deductions on assignments.
- 🎓 The focus of the video is on helping students succeed in Expert TA, particularly with questions that require symbolic expression inputs.
- 🔍 The interface for entering symbolic answers is designed to be intuitive, with a palette containing necessary variables and functions, reducing the need for complex syntax knowledge.
- 📝 Students can enter answers either by clicking buttons or typing, with the system guiding them to avoid syntax errors.
- 🛡️ The system is designed to protect against careless syntax errors, such as double minus signs or unmatched parentheses, without penalizing students for these mistakes.
- 💡 Hints are available to assist students who are struggling with problem-solving, authored by college-level physics instructors to provide a good starting point.
- 🔍 Feedback is provided specific to the mistakes made, using data mining and machine learning to tailor responses to common errors.
- 📚 The feedback system has been developed over five years, incorporating insights from tens of thousands of students and their mistakes.
- 📉 Expert TA is flexible and will recognize mathematically equivalent expressions, even if they are unnecessarily complex or use different notations.
- 🔧 If students believe their answer is correct but the system doesn't accept it, they are encouraged to seek help from their instructor or contact support for a potential fix.
Q & A
What is the main purpose of the Expert TA system?
-The main purpose of the Expert TA system is to assist students in successfully completing physics assignments by providing a user-friendly interface for entering symbolic answers and offering features that minimize confusion and protect against careless syntax errors.
How does the Expert TA system help students with entering symbolic answers?
-The Expert TA system provides an interface that includes a palette containing all necessary variables and functions for a given question, allowing students to enter answers by clicking buttons or typing, with the system guiding them to avoid syntax errors.
What happens if a student types a variable in a slightly different way in the Expert TA system?
-The Expert TA system is designed to recognize and accept slight variations in how variables are typed, ensuring that students do not lose credit for minor differences in their input.
How does the Expert TA system prevent students from making syntax errors?
-The system parses the student's answer as they type and toggles the available buttons to ensure that only mathematically sensible options are available at any given time, thus preventing common syntax errors.
What is the role of hints in the Expert TA system?
-Hints in the Expert TA system are authored by college-level physics instructors and are designed to provide students with a good starting point for solving problems, often addressing common mistakes made by students.
How does the feedback feature in Expert TA work?
-The feedback feature in Expert TA provides specific guidance related to the mistakes made by the student. It uses data mining and machine learning to analyze common errors and offers tailored feedback to help students correct their mistakes.
What should a student do if they believe their answer is correct but the Expert TA system did not accept it?
-If a student is convinced that their answer is correct and the Expert TA system did not accept it, they should either consult their instructor or contact the system support for assistance.
How does the Expert TA system handle complex or unnecessarily complicated answers?
-The Expert TA system is designed to recognize and accept any mathematically equivalent expressions, even if they are unnecessarily complex, ensuring that students are not penalized for the form of their answers.
What is the significance of the data mining and machine learning used in the Expert TA system?
-Data mining and machine learning are used in the Expert TA system to analyze student mistakes and provide personalized feedback, enhancing the learning experience and helping students avoid repeating common errors.
How does the Expert TA system ensure that the feedback provided is helpful and relevant?
-The Expert TA system ensures that feedback is helpful and relevant by using a combination of data analysis and hand-written feedback statements authored by college-level physics instructors, tailored to address specific student errors.
Outlines
📚 Expert TA Interface and Answer Entry
This paragraph discusses the Expert TA system's features designed to assist students in submitting symbolic expressions for physics problems. It emphasizes the ease of use of the interface, which includes a palette with necessary variables and functions, and the system's ability to guide students through correct syntax and avoid common errors. The instructor reassures students that they will not lose points for minor typing variations and that the system is designed to prevent syntax errors. It also mentions the availability of hints and feedback to help students with problem-solving, highlighting the system's use of data mining and machine learning to provide personalized feedback based on past student mistakes.
🔍 Understanding Feedback and Answer Flexibility in Expert TA
The second paragraph delves into the feedback mechanism of Expert TA, explaining how it uses data from past student submissions and instructor-authored feedback to guide current students. It assures students that the system is not overly strict with the format of their answers, as it recognizes mathematically equivalent expressions. The paragraph also addresses the possibility of errors in the system and encourages students to seek help from instructors or contact support if they believe their answer was marked incorrectly. The emphasis is on the system's commitment to accuracy and the importance of every point in the students' grades.
Mindmap
Keywords
💡Expert TA
💡Symbolic Expressions
💡Deductions
💡Interface
💡Palette
💡Syntax Errors
💡Hints
💡Feedback
💡Data Mining
💡Machine Learning
💡Trig Identities
Highlights
Instructor decisions on deductions for submission attempts, axes, hints, feedback, and late work are discussed.
Students are encouraged to contact instructors with questions about assignment deductions.
The video focuses on system features designed to assist with symbolic expression questions in Expert TA.
Effort has been made to design an intuitive interface for entering symbolic answers.
The interface includes a palette with all necessary variables and functions for a given question.
Students can enter answers by clicking buttons or typing, with syntax assistance provided.
The system prevents syntax errors by toggling available buttons based on the mathematical context.
No points are deducted for syntax errors, ensuring students are not penalized for minor mistakes.
Hints are available to help students who are struggling with problem-solving.
Feedback is provided specifically tailored to the mistakes made by the student.
Data mining and machine learning are used to generate helpful feedback for students.
Expert TA does not penalize different forms of correct answers, recognizing mathematical equivalence.
The system is designed to be forgiving, with a focus on understanding the physics rather than syntax.
Instructor assistance is available for questions or issues regarding Expert TA.
The video concludes by emphasizing the importance of accurate grading and the availability of support.
Transcripts
in the expert TA overview video we
reviewed the main points and clicks of
the class management page and discussed
how instructors make decisions on
deductions associated with submission
attempts axes and hints and feedback and
late work as a reminder if you have any
questions about the deductions on an
assignment please contact your
instructor in this video we will take an
assignment an expert TA and discuss
system features designed to help you be
successful in expert TA you will
experience working different question
types this video will focus on questions
that require you to inner symbolic
expressions let's go ahead and work part
b of the problems showing on the screen
the problem is asking us to write an
expression for the sum of forces in the
x-direction as a student your time
should be spent thinking about the
physics and not spent trying to figure
out how to enter in an answer a lot of
effort has gone into the design of the
interface used to enter symbolic answers
there are several features in place to
minimize confusion you won't have to
search through drill down menus to find
a symbol or function you also won't have
to wonder about the syntax involved in
learning Greek symbols functions or
other variables the palette will contain
all the variables in terms you need for
a given question and some that you don't
wish instructors feel is an important
part of the assessment process you can
enter an answer by simply clicking a few
buttons you can also type to enter in
answers as you type the cosine you will
see how there are two choices available
the system will show you what to type
and what will be displayed cosine alpha
first cosine beta you can use your
keyboard to enter numbers and math
operators that you see on the right side
of the palette such as the minus sign
you will never lose credit for typing in
a variable in a slightly different way
because you are restricted to a defined
variable set for example if you try to
type in t one with HTML subscript tags
you would see that the system does not
register a match for this entry there
are also several features designed to
protect students from making careless
syntax errors you would never put two
minus symbols in a row when writing an
answer so we don't want you to
accidentally click the button twice
we actually parse your answer as you
type it and we toggle the button so
right so the only the things that make
sense mathematically are available at
any given time you can notice in this
case the minus sign is no longer
available it is possible to type in an
answer that has syntax errors but we
don't want you losing points or a
submission to Tim for these mistakes
for example let's enter an answer that
has more open parentheses than close
parentheses
you will notice the system lets us know
we have entered an incorrect answer with
non matching parentheses you will also
notice that in the grade summary all
submission attempts still remain and no
points have been deducted for entering
an incorrect answer in expert EA there
are hints available to you if you are
having trouble getting started on a
problem we recommend accessing hints
these hints are authored by college
level physics instructors and should
offer a good starting point for the
problem these hints often address common
mistakes that students have made while
solving these problems for example here
the second hit points out a key aspect
of this problem the angle alpha is
measured from the vertical axis rather
than the horizontal and this changes how
sine and cosine should be applied there
is also feedback available to you an
expert TA let's put in a few answers so
that we can talk about feedback the
correct answer to the question is t2
cosine beta minus t1 sine alpha as is
shown on the screen you shouldn't
necessarily know that right now since it
is the start of the semester but this
can still serve as an example let's make
this answer a few errors and also not be
as simplified as is possible let's put a
few extra parentheses around t1 and also
make the mistake of having cosine alpha
instead of sine alpha
once we submit our answer we are told
that feedback is available and if we
access that you can see that we are
warned about the angles the feedback is
specific to the mistake so if we put a
different incorrect answer we're gonna
receive a different message let's fix
our trig mistake and said make a sign
error
again you can see that the feedback is
not generic it's directly related to the
mistake that is made we strongly
encourage you to access feedback when it
is available if we don't have anything
meaningful to provide no feedback is
offered for this question t2 squared
minus T 1 cubed is really far from the
correct answer as you can see we
indicate that no specific feedback is
available and you can see that the
feedback button is disabled here we
recommend accessing available hints and
relevant material a visit to office
hours or an email to the TA or
instructor could be helpful again if we
do say we have feedback it means it is
probably pretty helpful we actually use
data mining machine learning and a lot
of hard work by college level physics
constructors in order to provide you
with the best feedback and help possible
every semester for over five years now
tens of thousands of students have used
extra TA and were assigned a lot of the
questions that will be assigned to you
this semester as those students did work
they made some mistakes as said earlier
we deta mind all those mistakes applied
machine learning then had college level
physics instructors author hand written
feedback statements that would be
helpful for you the student this is what
is presented to any future student
happens to make the same mistake finally
please don't worry about expert TA being
picky about what form your answers in it
doesn't matter if you put in extra
Prinze use trig identities or anything
like this
expert a will recognize any and all of
mathematically equivalent expressions to
demonstrate this you can see that the
expression on the screen is
unnecessarily complex 42 cosine beta I
have typed in cosine beta using a trig I
do me 1 minus sine beta squared is
cosine squared beta and if I divide it
by cosine beta
this will just be t2 cosine beta I've
also put in some extra Prinze that the
math engine will have to deal with
we should have minus t2 sine alpha but I
will put in plus t2 sine alpha and then
multiply by negative 1 again this is
unnecessarily complicated but the points
to show you that expert EI will
interpret and accept your answer even if
you type it in a vein
perform with that said of course there's
a chance that you put in the correct
answer and we didn't accept it our
technology is solid but we are always
adding to our collection of physics
questions and sometimes a new question
does have an error if you are convinced
your answer is correct either run it
past your instructor or contact us if
our answer isn't correct we will fix it
then fix your grade and the grade of any
other student who is also affected the
accuracy of your grades is important
every point counts this has been a very
detailed look at the equation question
type we hope this has been helpful
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