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NOTES.DOC
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1988-09-07
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Spreadsheet and File Management Concepts Using 123
The following are brief descriptions of the the 123 spreadsheet files
(*.WK1), student handout files (*.HDT) and assignment files (*.AST)
that I use in teaching spreadsheet concepts with 123.
WORKSHEET FILES
I. BASIC CONCEPTS AND TERMS:
II. FORMATTING AND RANGES:
III. WHAT-IF MODELS:
IV. DATA FILE OPERATIONS:
V. MISCELANEOUS TOPICS:
I. BASIC CONCEPTS AND TERMS:
SILLY.WK1
Demonstration spreadsheet to illustrate cell addressing and the
LABEL data type.
SCRNFMT.WK1
Used in first demonstartion session, along with a matching
handout (not on disk) to show the idea of labels, formulas,
current cell, command and status areas on the screen.
COLADD.WK1
Used in first demonstration session, along with a matching
handout (not on disk), to illustrate the idea of a formula.
STUDENT.WK1
Student income/expense example, introduces the FORMULA data type
and used in STUDENT.AST.
FORMULAS.WK1
This spreadsheet illustrates various formuli and their values.
II. FORMATTING AND RANGES:
FORMATS.WK1
This spreadsheet illustrates the various format options.
DODGBEF.WK1
Unformatted baseball statistics, which the student is asked to
format in DODGER.AST. The formatted version is used in
DODGPRNT.AST and DODGXFR.AST.
DODGAFT.WK1
Formatted version of DODGBEF.WK1.
III. WHAT-IF MODELS:
INTMODEL.WK1
This spreadsheet introduces the idea of a "what if" model, as
opposed to a form-automation application. I demonstrate it in
class along with INTMODEL.HDT.
REINVEST.WK1
This is a real 16-parameter "what if" model (I used it in making
a real-estate investment). I demonstrate it to illustrate what-
if analysis, screen-splitting, and as a jumping off point for
discussing sources of errors in spreadsheets and "style" and
"debugging" tips to avoid them. (Would you make an investment
based on the results of this model? Do you trust it, or would
you be suspicious of errors? ...). The spreadsheet is documented
in REINVEST.HDT, and it is used in the REXFR, WHATIF and
REINVEST assignments.
IV. DATA FILE OPERATIONS:
DATASORT.WK1
This is the real estate data file, which I use for an in-class
demo to illustrate the sorting of a data file. It is the first
data file illustration, and I use it to introduce the DATA
commands, the ideas of file, record, and field, and the column-
heading conventions of 123.
DATAFIND.WK1
This spreadsheet illustrates database search for a single-field
boolean criterion. I use it as an in-class demo along with the
handout in FIND.HDT.
DATAONLY.WK1
This is the real estate data file, which is used as input for the
assignment DATA.AST.
DATAFND2.WK1
This spreadsheet illustrates database search for a two-field
boolean criterion. I use it as an in-class demo along with the
handout in FIND.HDT.
DATAASST.WK1
This is a solution to DATA.AST.
V. MISCELANEOUS TOPICS:
BINOMIAL.WK1
This spreadsheet displays a binomial distribution, given P and N.
It illustrates the fact that there are many non-administrative
spreadsheet applications.
LAUGHS.WK1
Illustrates the idea of macros with a simple example.
MULTABLE.WK1
Generalized multiplication table. Assign the students to
duplicate it, as an exercise in learning the difference between
relative and absolute addresses with the COPY command.
FNS.WK1
This spreadsheet combines several independent, one-screen sized
spreadsheets, each of which illustrates a different function. I
use them in an in-class demonstration, along with the three
handouts in FNS.HDT. If possible, go through them in the lab
with the students on the computers. Demonstrating all of the
functions requires about two hours. The functions illustrated
are: SUM, AVG, MIN, STD, IF, IRR, NPV, VLOOKUP, and DAVG.
HANDOUT FILES
The following are student handouts I use. Several of them document
the spreadsheets listed above.
MENU.HDT
This handout summarizes selected menu commands, the function key
assignments and the use of the <esc>, <period>, and <cursor
control> keys in pointing to ranges.
INTMODEL.HDT
This handout shows the INTMODEL.WK1 spreadsheet model.
FNS.HDT
This is a three-handout set on functions. The first handout is
an explanation of the idea of present value for students who have
not studied finance. The second handout is a short "manual"
giving the general form of the functions used in FNS.WK1, with
space for the student to write notes. The third handout is a
listing of each of the FNS.WK1 spreadhseets and models.
DATAFND.HDT
This is a two-handout file. The first, used with DATAFIND.WK1,
illustrates a single-field search in the real-estate data file.
The second, used with DATAFND2.WK1, illustrates a two-field
search.
CONSULT.HDT
A listing of the CONSULT.WK1 model. I combine this with a screen
shot of the resultant spreadsheet in the handout, but I do not
have it in machine-readable form. (I will add it as soon as I
get a screen-save utility from somehwere).
REINVEST.HDT
This handout doucments the REINVEST.WK1 spreadsheet. It shows
the model parameters and describes the remaining portions of the
model (intermediate results, operating income and expenses, cash
flow, accumulated capital, and opportunity cost).
CONSOLID.HDT
This handout illustrates consolidation of spreadsheets by
appending and addition.
MULTABLE.HDT
This handout illustrates the multiplication table
spreadsheet which is used to teach relative versus absolute
addresses in COPYing.
ASSIGNMENT FILES
The following files contain the assignments I use in teaching 123.
Many use the spreadsheets listed above.
STUDENT.AST
This assignment introduces spreadsheet formulas. It is based on
STUDENT.WK1.
LABEL.AST
This is the first spreadsheet assingment, introducing spreadsheet
terms, entering labels, moving the cursor, and using commands.
The student creates a spreadsheet with a few labels in it and
answers a few simple questions.
OWNSS.AST
This assignment asks the student to create a personally useful
spreadsheet. If they cannot think of one, they are asked to
prepare a 1040 tax form.
SSEVAL.AST
This is a software evaluation assignment -- a quick "test drive"
of a spreadsheet program. The student does simple experiments to
measure memory capacity, recalculation speed, disk I/O time and
storage requiremnts.
PRINT.AST
The student prints from DODGAFT.WK1. The entire spreadsheet,
selected portions, and the underlying model are printed.
DODGER.AST
This assignment covers spreadsheet formatting. The student is
asked to clean up the format of DODGBEF.WK1. Some questions also
deal with formulas. The handout includes a listing of the
DODGBEF model. The formatted spreadsheet is used in
DODGPRNT.AST, so the student should save it.
DODGPRNT.AST
This assignment familiarizes the student with the spreadsheet
printing and gives practice with the 123 print submenu. The
formatted version of DODGBEF is used.
REINVEST.AST
This assignment gives practice with a realisticly sized what-if
model.
WHATIF.AST
This is a variation on REINVEST.AST.
DODGXFR.AST
In this information transfer assignment, the student transfers
portions of DODGAFT.WK1 spreadsheet to a word processing program.
The assignment uses the same skills as REXFR.AST, but is not
business oriented.
REXFR.AST
In this information transfer assignment, the student transfers
portions of REINVEST.WK1 to a word processing program. This
assignment uses the same skills as DODGXFR.AST, but is business
oriented.
DATA1.AST
This assignment introduces file management terms and query
operations. The student SORTs and FINDs records in
DATAONLY.WK1.
DATAEXT.AST
This assignment gives practice with the EXTRACT command. The
studeent extracts selected records and fields from the file
DATAONLY.WK1.
APARTREC.AST
This assignment asks the student to build their own
spreadsheet. I use it toward the end.
INTMODEL.AST
This is the first model-building assignment. I use it after
the DODGER assignment.
MULTABLE.AST
This assignment illustrates relative versus absolute
copying.