Activating Computer Architecture with Classroom Presenter Beth Simon University of San Diego Richard Anderson, Steven Wolfman University of Washington

Classroom Presenter System to allow for dynamic presentation of PowerPoint-style slides –High-quality Tablet PC-based inking –Wireless network connectivity Supports separation of views –Instructor has one view on Tablet –Students have a different view on projector Review of use in a small undergraduate Patterson and Hennessey-style architecture class –Sophomore level, small classes (10-20)

Basic Class Setup Instructor has wireless Tablet PC and a “deck” of slides –Prepared in PPT, exported to a Presenter deck –Runs Presenter in “Instructor” mode –Exports deck “Regular” machine drives projector –Runs Presenter in “Viewer” mode –Requests active deck Slides are wirelessly transferred to projecting machine –Slide deck on viewer controlled wirelessly by instructor tablet

Classroom Presenter Highlights Spontaneity: –Inking over for emphasis –Providing additional information Slide shrink Erasing –Solving problems interactively Control –Filmstrip and preview –Whiteboard Instructor Notes –Notes on “how” to explain concept –Answers to problems

Time versus throughput Execution time is measured in time units/job. –For a SINGLE PROGRAM to execute on a system, usually in a dedicated environment Throughput is measured in jobs/time unit. –Total amount of work (multiple jobs) done by a computer for a given amount of time. But “time = 1/throughput” may be false. –It takes 4 months to grow a tomato. Can you only grow 3 tomatoes a year ??

SPEC on Pentium III and Pentium 4 What do you notice?

Amdahl’s Law Practice Way cool biological modeling code –4 days ET on current machine, spends 20% of time doing integer instructions –How much faster must you make the integer unit to make the code run 8 hours faster?

lw without the displacement JumpBranchMemReadMemWrite ALUSrcALUOpMemToRegRegWriteRegDest

Upcoming Classroom Presenter Features Private Inking –Notes you take to yourself in class Additional instructor notes off-screen –Pulled directly from PPT notes field –Shown filmstrip-view style Tablets for Students –Group problem solving –Quick display and markup Wireless Projectors Large Classroom-specific –Classroom Feedback System (implemented) –Structured Interaction

Where to get it: Download Presenter from: – presenter/ most stable –No integrated instructor mode objects –Personally had few problems with Integrated IMode and PPT add in Toolbar changes won’t stay Please register with Acknowledgements: –UW Educational Technology Group (Richard Anderson)

Brainstorming Session: How would you use this technology?

Classroom Feedback System Problem: Student feedback does not scale –If method does scale, how does instructor handle load? Solution: Embed clickable simple feedback options in slide deck received by students –Example, More Information, Got It Students can click on current or previous slide “Request” shows up color coded on instructor slide SIP: Structured Interaction Presentation –Greatly enhance student interaction options –Allow large numbers of students to participate in pre-planned problem solving, –provide way of analyzing and aggregating the data quickly for use in discussion

Student provides feedback

Instructor receives feedback

Example: America Before Columbus [Cross and Angelo] 1.How many people lived in North America in 1491? 2.How many years had they been there by 1491? 3.What significant achievements had they made in that time?

1.About how many people lived in North America in 1491? 2.About how many years had they been on this continent by 1491? 3.What significant achievements had they made in that time? Your Impressions of America Before Columbus

1.About how many people lived in North America in 1491? 2.About how many years had they been on this continent by 1491? 3.What significant achievements had they made in that time? % completed Your Impressions of America Before Columbus

How many people? fromto4002,500, ,000100,0001,000,00010,000,000

“Solving” Natural Language Problem: handling free text responses in class is impractical Solution: “distributed student computation” –allows rapid, in-class turnaround –Via wireless submission, database queries