Embed Size (px)
DESCRIPTION
COMPUTER TECHNIQUES for Teachers. Pablo Manalastas, PhD Dept of Info Systems & Computer Science Ateneo de Manila University [email protected]. Computerized Class Record. One class record per section. Students’ names. Scores in quizzes, recitations, exams. - PowerPoint PPT Presentation
Citation preview
COMPUTER TECHNIQUESfor Teachers
• Pablo Manalastas, PhDDept of Info Systems & Computer ScienceAteneo de Manila [email protected]
Computerized Class Record
• One class record per section.
• Students’ names.• Scores in quizzes,
recitations, exams.• Miscellaneous notes
and observations about each student.
• Grade computation.
Advantages of ComputerizedClass Record
• Each teacher can maintain own class record.
• Easy to maintain.• Grade computation
done by computer.• Data can be exported
to school-wide database.
Sample Class RecordSimple Average
Exam1 Exam2 Exam3 Exam4 Total AverageAbad, Jose 79 80 78 82 319 79.8Burgos, Jaime 95 90 92 94 371 92.8Cruz, Jemma 85 82 80 83 330 82.5David, Luisito 77 78 79 77 311 77.8Edralin, Imee 79 80 82 78 319 79.8Fernandez, Luis 89 88 86 87 350 87.5Garcia, Felipa 72 74 73 71 290 72.5
Simple Average Computation
• TotalF2: =SUM(B2:E2)
• AverageG2: =F2/COUNT(B2:E2)
Sample Class RecordWeighted Average
Exam1 Exam2 Exam3 Exam4 Total AverageWeights 20 20 20 40 100
Abad, Jose 79 80 78 82 8020 80.2Burgos, Jaime 95 90 92 94 9300 93.0Cruz, Jemma 85 82 80 83 8260 82.6David, Luisito 77 78 79 77 7760 77.6Edralin, Imee 79 80 82 78 7940 79.4Fernandez, Luis 89 88 86 87 8740 87.4Garcia, Felipa 72 74 73 71 7220 72.2
Weighted Average Computation
• TotalsF2: =SUM(B2:E2)F3: =$B$2*B3+$C$2*C3+$D$2*D3+$E$2*E3
• AverageG3: =F3/$F$2
Grade EquivalentTable Lookup
Exam1 Exam2 Average Grade LowLim GrAbad, Jose 79 80 79.5 B 0.0 FBurgos, Jaime 95 90 92.5 A 50.0 DCruz, Jemma 85 82 83.5 B 60.0 CDavid, Luisito 77 78 77.5 B 68.0 C+Edralin, Imee 79 80 79.5 B 76.0 BFernandez, Luis 89 88 88.5 B+ 84.0 B+Garcia, Felipa 72 74 73 C+ 92.0 A
Table Lookup Computations
• AverageD2 =AVERAGE(B2:C2)
• Letter GradeE2 =VLOOKUP(D2,$G$2:$H$8,2)
Root Guessing in Algebra
• Linear and quadratic equations are easy to solve manually.
• Equations of degree three or higher are difficult to solve.
• Example: find roots ofx^4 +x^3 –x^2 –3x –6= 0
Advantages of Root GuessingUsing Excel
• Unlike manual computations, Excel computations are easy and without errors.
• Many guesses can be quickly tried and either accepted or discarded.
• Even difficult problems become easy.
Root GuessingHalf-Interval Search
F(X)=X̂ 4 + X̂ 3 - X̂ 2 - 3X - 6
X F(X)First Guess 0 -6Midpoint Guess 1 -8Second Guess 2 8
Formulas forHalf-Interval Search
• Midpoint GuessB5: =(B4+B6)/2
• Function ValuesF(X)=X^4 + X^3 - X^2 - 3X – 6 =(((X+1)*X-1)*X-3)*X –6C4: =(((B4+1)*B4-1)*B4-3)*B4-6
Root GuessingNewton Raphson Method
• Objective:Solve the equation f(x) = 0
• Get formula for derivative f ‘(x)
• Make initial guess x0
• Compute next guessx1 = x0 – f(x0) / f ‘ (x0)
Root GuessingNewton Raphson Method
F(X)=X̂ 4 + X̂ 3 - X̂ 2 - 3X - 6F'(X)=4x 3̂ + 3X̂ 2 - 2x - 3
X F(X) F'(X)First Guess 2 8 37Second Guess 1.783784
Formulas forNewton Raphson Method
• Function valueF(X)=X^4 + X^3 – X^2 – 3X – 6 =(((X+1)*X-1)*X-3)*X-6C4: =(((B4+1)*B4-1)*B4-3)*B4-6
• DerivativeF’(X)=4X^3 + 3X^2 – 2X – 3D4: =((4*B4+3)*B4-2)*B4-3
• Second GuessB5: =B4 – C4/D4
Creating Your OwnWebpage
• Information that you would like to be publicly known can be published through your personal webpage.
• Convenient, quick and economical method of distributing data.
What Can You Publishon Your Webpage?
• Teacher’s Resume.• Stuff for your
students: assignments, extra readings, review questions, grade reports, etc.
• Your publications, writings, notes, etc.
Sample Web Page<html><head><title>Sample Teacher’s Webpage</title></head><body><h1>Pablo’s Home Page</h1><h2>Not for the weak of heart</h2><h3>This site contains adult material</h3><hr><p>While this sample page is quite trivial, it contains the
most basic ingredients in a web page</p></body></html>
Sample Webpage Display
Lists<html><head><title>Sample List</title></head><body><h1>My Christmas List</h1><ul><li>New house at Forbes Park<li>Mercedes Benz SLK 180<li>Sony Digital Camera 4.1M pixels<li>Nokia 9850 Mobile Phone<li>Angelina Jones</ul></body></html>
List Display
Tables• <html><head><title>Sample Table</title></head>
<body><h1>Table of Items to Buy</h1><table><tr><td><b>Description</b></td><td><b>No</b></td><td><b>Unit Price</b></td></tr><tr><td>Blue jeans</td><td>2</td><td>1200.00</td></tr><tr><td>Polo shirt</td><td>2</td><td>800.00</td></tr><tr><td>Leather shoes</td><td>1</td><td>1500.00</td></tr><tr><td>Unmentionables</td><td>4</td><td>200.00</td></tr><tr><td>Bath accessories</td><td>1</td><td>80.00</td></tr></table></body></html>
Table Display
Frames
• <html><head><title>Nested Frames</title></head><frameset cols="40%,*">
<frameset rows="50%,*"><frame src="frame1.html"><frame src="frame1.html">
</frameset><frameset rows="20%,40%,*">
<frame src="frame1.html"><frame src="frame1.html"><frame src="frame1.html">
</frameset></frameset></html>
Frames Display
Forms• <html><head><title>Sample Form</title></head>
<body><h1>Sample Survey Form</h1><p>Please enter your personal data</p><hr><form action="mailto:pmana@localhost" method="post"> Your name: <input type="text" name="name" size=30
maxlength=80><br><br> Sex: <input type=radio name=sex value="male">male <input type=radio name=sex value="female"> female<br><br> Currently enrolled?
<input type=checkbox name=enrolled value="off"><br><br> <input type=submit value="submit form"></form><hr></body></html>
Form Display
