Just-in-Time Teaching in a Large Lecture Setting (Mats Selen, UIUC Department of Physics, July 23, AAPT-2001) - PowerPoint PPT Presentation

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Just-in-Time Teaching in a Large Lecture Setting (Mats Selen, UIUC Department of Physics, July 23, AAPT-2001)

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in a Large Lecture Setting (Mats Selen, UIUC Department of Physics, July 23, AAPT-2001) Q: Is conceptual understanding as important as problem solving skills? – PowerPoint PPT presentation

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Date added: 29 January 2020
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Title: Just-in-Time Teaching in a Large Lecture Setting (Mats Selen, UIUC Department of Physics, July 23, AAPT-2001)


1
Just-in-Time Teaching in a Large Lecture
Setting (Mats Selen, UIUC Department of
Physics, July 23, AAPT-2001)
  • Q Is conceptual understanding as important as
    problem solving skills?
  • A YES, of course !
  • Q What can we do to help develop this skill??
  • Modify lecture structure ACTs
  • Pre-Flights before every lecture
  • Implementation
  • Results

2
Setting the stage
  • Physics 101 overview
  • Algebra-based intro physics.
  • About 400 pre-med students per semester
  • Covers mechanics, heat thermo, waves sound
  • Very fast paced, lots of work, 5 credit hours.
  • Weekly structure
  • Two 1-hour lectures
  • Active learning
  • One 2-hour discussion section
  • includes weekly quiz
  • One 3-hour laboratory section
  • Hands-on discovery
  • Web based homework
  • Great systemanother talk

3
  • Why we should stress concepts

Physics 101 Midterm Exam 1, Spring 2000
On this exam, the conceptual problems were worth
about 30 of the total.
4
Pre-Flights !!
  • Students are asked to answer a set of conceptual
    questions (on the Web) prior to every lecture
    (and discussion, and lab).
  • The main structure is
  • Students read about material in text.
  • Students answer pre-flight questions on material
    prior to lecture.
  • Physics 101 PFs due at 6am, lecture starts at
    1pm.
  • Graded on participation, not correctness.
  • Instructor uses pre-flight responses to guide
    lecture preparation.
  • Stress difficult material
  • Pre-flights are reviewed during lecture, often
    presented again a ACTs, and often capped off
    with a demo.
  • With careful preparation, the pre-flights can
    form the backbone of the lecture.

5
What I typed in a simple text file
What the students see on the web
6
Simple setup on our NT server Text ( pictures)
for PF 2 in here
Notice Lots of folks use our web-based
grade-book
7
The instructors interface to the student
responses (also on web)
Statistics
Free response
8
Lecture 2, Pre-Flights 12
  • If the average velocity of a car during a trip
    along a straight road is positive, is it possible
    for the instantaneous velocity at some time
    during the trip to be negative?
  • 1 - Yes
  • 2 - No

9
Lecture 6, Pre-Flight Questions 78
  • Two identical boxes, each having a weight W, are
    tied to the ends of a string hung over a pulley
    (see picture). What is the tension T in the
    string? see text 4.10 1. T0 2. TW 3. T2W

10
Students see their own answers
  • Two identical boxes, each having a weight W, are
    tied to the ends of a string hung over a pulley
    (see picture). What is the tension T in the
    string? see text 4.10 1. T0 2. TW 3.
    T2W

The tension on the string would be the same if
you hung the two boxes on the same end. making it
equal to 2W.
11
Lecture 20, Preflight 1
  • Suppose you float a large ice-cube in a glass of
    water, and that after you place the ice in the
    glass the level of the water is at the very brim.
    When the ice melts, the level of the water in the
    glass will
  • 1. Go up, causing the water to spill out of the
    glass.
  • 2. Go down.
  • 3. Stay the same.

12
Nice Tools We can filter on responses based on
other questions !!
13
Lecture 20, Preflight 2
  • Which weighs more
  • 1. A large bathtub filled to the brim with water.
  • 2. A large bathtub filled to the brim with water
    with a battle-ship floating in it.
  • 3. They will weigh the same.

Tub of water ship
14
Students have fun with answers...
  • Shown is a yummy doughnut. Where would you
    expect the center of mass of this breakfast of
    champions to be located? (Explain your reasoning
    Homer).

15
Some students thoughts on doing 50 pre-flights
16
Pre-Flights Are they worth the work ?
  • YES
  • Wellwhat is the work?
  • Question preparation.
  • Carefully chosen questions can be the backbone of
    the lecture.
  • Takes some time to get it right.
  • Last minute on the fly lecture preparation.
  • Con Takes me all morning on the day of lecture.
  • Pro Takes me all morning on the day of lecture.
  • Benefits
  • Students seem to like it.
  • They know I take the time to read their
    responses.
  • They have a stake in the lectures.
  • I love it !!!!
  • The most fun I have had teaching.
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