Online Scoring System & Reference Table Updating System for PE of NCU Presented by Chung-lien Tseng Date: 10/28, 2004

Online Scoring System& Reference Table Updating

System for PE of NCU

Presented by Chung-lien Tseng

Date: 10/28, 2004

Online Scoring System 2

Outline Introduction Requirement Analysis Evaluation of Alternatives VBA Introduction Database Design Algorithm of Reference Table Problems and Solutions System Structure and System Display Limitations and Constraints Conclusion


Introduction It was a one-year project for MIS students of NCU Objectives

Provide an online system (for equipment & place management) for PE office

Facilitate the process of scoring Target users

Teachers of PE Students Administer of the system

My job-Online Scoring System




Requirement Discovery

Teachers have to calculate the average score and then fill in the official form

Past grades can’t be saved and checked Some test items of PE don’t have real

scores, such as triple jump, running The reference table of converting test

grades into scores of percentage is difficult to be updated, and the data is old


Requirement Analysis

To maintain the reference table and take the ability of current students into account Reference Table Updating System

To facilitate the process of scoring and keep the past student grades on file Online Scoring System




Evaluation of Alternatives

Use Internet Programming Language For Reference Updating System

Internet Programming LanguageASPASP.NET

For Online Scoring System Excel with VBA Internet Programming Language (ex: ASP, ASP.NET,

script languages)


Why Did I Choose Excel

Most of PE teachers are normal users, so the system must be easy to use

The scoring system needs lots of fields to be filled in grades, and some fields need to be frozen

The scoring system needs a mechanism to transform grades of test into percentage scores automatically


Why Did I Choose Excel (Cont’d))Excel with VBA ASP, Script

languages…

Easy to learn and use

Almost all PE teachers can use Excel

With good interface, it’ll be easy to use

Need many writable fields

Excel interface is composed of table

Insufficient knowledge to do that

Need to transform score automatically

Can use Excel’s formula function to achieve

Large volume in-time transformation takes lots of system resource




VBA Introduction

VBA stands for Visual Basic Application Similar to VB Built in every AP of Microsoft Office (Word,

Excel…) What’s different with macro?

A VBA project may contains several macros Macro: a public sub-process with no parameter Macro can be created by either “macro

recorder” or “Visual Basic Editor”


Pros and Cons of VBA

Pros Facilitate the use of Microsoft Office

Record (compile) a repetitive job as macro, so that we only have to load the macro every time we need to do that job

Cons Macro may be a malicious program

To avoid being attacked, we can set the security level to “High” or “Medium”

Digital Signature




ER Modelteacher

(account)

course

student

teach

enroll

test

testitem

refmeta

reftable

generate

include

containtake

link

teachclass

score


Database Design Online Score System

account teacherName, id, password

teachclass teacherName, courseName

course courseName, courseId, class

student studentNo, studentName, studentGender, studentDept, studentGrade

score studentNo, courseName, score

testitem courseName, itemNo, item, itemPercent

test courseName, studentNo, itemNo, testScore


Database Design (Cont’d)

Reference Table Updating System testitem

courseName, itemNo, item, itemPercent

reftableitem, result, gender, refScore

refmetaitem, gender, measure, refSize, refMean, refStd, refS

izeStd2, refSizeMean2, refSizeMean




Reference Table Algorithm

Based on past data Average grades of current student have

most of percentage of new reference table Use the original algorithm of old system to

generate new reference table


Reference Table Algorithm (Cont’d)

Algorithm Input of algorithm: mean( ), std (S) of all grades To calculate joint and S of old and new data, we

need , , and for

i=I means the old reference table data

X

Xni

XnSnXn

nXn

newnewS

Xnew

i

iiii

i

ii

222

Xn ii Xn ii

2 Sn ii

2


Reference Table Algorithm (Cont’d)

Range of real score: 40~100 (40 is the lowest score of PE in NCU)

Slope: relation between test grades and scores>0triple jump; <0running

Set Upper Bound (UB): a range be deducting later

UB= 4* S (UB= if UB> ) st is a decided parameter for every score range

If the slope>0 between test grades and scores, i.e. direction ratio, st decreases when score increases; otherwise, st increases when score increases

X X


Reference Table Algorithm (Cont’d) Example

slope>0, i=score

for i=41 to 100if i>40 and i<51 then

st=0.135 * stdelseif i>50 and i<61 then




st=0.115 * stdelseif i>75 and i<81then

st=0.11 * stdelseif i>80 and i<86then

st=0.105 * std

elseif i>85 and i<89 then st=0.1 * std


lseif i>91 and i<95 then st=0.09 * std



end if

ub=ub-stscore(i)=mean-ub

next

score

test grade

ub curve0

score(i) curvemean grade

65

4.6m

Triple jump




System Flowchart

Online Scoring System

Log inChoose course & Scoring mode

resetmodify

Set test items and %

Enter Excel & start scoring

Save

Print

Leave

Leave & scoring another course (re-log in)

Add or delete items


Problems

1. How to transform test grade into score immediately?2. How to tell whether a test item needs the reference table?3. How to renew the scores if relative reference table has

been updates?4. How to control or jump to a given field of column?5. How to transmit data (ex: teacher’s name, course name,

etc.) from webpage to Excel?6. Where to put the Excel program (at server or client)?


Solution 1

How to transform test grade into score immediately?

1. Save reference tables in database

2. Load required reference tables at the beginning and when needed

3. Use Excel’s built-in “VLOOKUP()” formula to convert test grade into score


Solution 2

How to tell whether a test item needs the reference table?

1. Use Combo Box to list all referenced test items when choosing test items

2. If the listed item is selected link to relative reference table

3. If the teacher types test item himself a normal test item


Solution 3

How to renew the scores if relative reference table has been updates?

1. Only record the original test grades when saving file

2. Auto-transform into percentage scores on scoring (i.e. open Excel)

3. Scores can’t be renew immediately if administer updates the reference while someone is scoring


Solution 4

How to control or jump to a given field of column?

1. Naming some special fields and every column

2. A column is named after item number or data type (stdno, gender…) it is filled

3. Use Excel’s ‘Range(“name”)’ function to control whole column


Solution 5

How to transmit data (ex: teacher’s name, course name, etc.) from webpage to Excel?

1. Record information needed into database while interface is changing from webpage to Excel

• Add a new table “scoreLog” with fields “ipAddress”, “teacherName”, “courseName”, “status”…

2. After opening Excel, running “ipconfig” command by Excel function to get IP address

3. According the IP of the teacher, retrieve required information from database


Solution 6

Where to put the Excel program (at server or client)?

1. The Excel program is saved at server1. Easy to maintain

2. Prevent Excel program from being destroyed

3. More mobility

2. Side effect“Read only” dialog shows when 2 teachers score at the same time




Reference Table Updating System

Log in

Choose update mode (add item or update)

add new item

just update

Set new item information (ex: name, measure unit, slope)

Preview updated reference table

Update reference table

Choose items to be updated

Note: This system is available only with 2 weeks after school opens.


Reference Table Updating System (Cont’d)






Online Scoring System

Log inChoose course & Scoring mode

resetmodify

Set test items and %

Enter Excel & start scoring

Save

Print

Leave

Leave & scoring another course (re-log in)

Add or delete items


Online Scoring System (Cont’d)










Limitation and Constraints

System Online Scoring System can only be run in Excel 2002

and above Insufficient security for student data and scores The VBA won’t work if user doesn’t agree it to run—

need trusted digital signature The transfer process between webpage and Excel is

rough Data of reference table are not abundant enough


Limitation and Constraints (Cont’d)

External Environment Can’t integrate with system of Office of

Academic Affairs Communication with end user is not enough Immature programming technique




Conclusion

It an unfinished project In the future

Move all scoring system on the Internet Emphasize on the security of system and

database Enhance system performance

Wait a minute

… it’s present time!!

Documents

Online Scoring System & Reference Table Updating System for PE of NCU Presented by Chung-lien Tseng Date: 10/28, 2004