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Data Data Data Intros… Phil Bettendorf / Level Data Background: Teacher, PowerSchool Admin, Network Admin, programmer, systems engineer.

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Presentation on theme: "Data Data Data Intros… Phil Bettendorf / Level Data Background: Teacher, PowerSchool Admin, Network Admin, programmer, systems engineer."— Presentation transcript:

1 Data Data Data Intros… Phil Bettendorf / Level Data Background: Teacher, PowerSchool Admin, Network Admin, programmer, systems engineer

2 Data Data Data Agenda 1.Understanding Powerschool internals – review 2.Export via DDE and analysis in Excel 3.Another method to get at data… Bonus!!!

3 Data Data Data Background… Scope part 1 Power School Admin URL/admin Subs URL/ subs Teachers URL /teachers Teachers Web based Parents URL /public Data Web based Electronic Gradebook

4 Data Data Data As an important step of knowledge discovery in databases, data mining is a process of analyzing data in order to discover implicit, but potentially useful information and uncover previously unknown patterns and relationships hidden in data, which has been applied in many fields. Background… Definition How can we achieve this in Powerschool? 1.DDE Exports

5 Data Data Data Background… DDE provides us a tool to pull information out of Powerschool for analysis. Bridging the Data Gap is only inhibited by creativity… Dont be limited to traditional methods; think outside the box !!!

6 Data Data Data Data-Driven Decision Process

7 Data Data Data PowerSchool Schema Put the following in your URL bar: –http:// /admin/home?ac=structurehttp:// /admin/home?ac=structure There are over 195 tables within Powerschool that all are related in one way or another

8 Data Data Data Field 1 Field 2 ID Feeder 1 ID Feeder 2 ID Feeder 3 ID Feeder X ID Feeder 1 ID Feeder 2 ID Feeder 3 ID Feeder X ID Table relationships CC Table ID DateEnrolled DateLeft StudentID SchoolID SectionID TermID Student Table ID Schools Table ID Section Table ID Terms Table ID

9 Data Data Data Exporting Data From PowerSchool Using DDE - DDE stands for Direct Database Export and can be found by going to System, Direct Database Export. Since it's part of the System pages, not everyone may be able to access it depending on security privileges. DDE lets you view information in the various database tables that make up the PowerSchool database and export that information out to a file that can be opened by Excel. DDE does not allow you to make any changes to the database directly - something known as DDA (Direct Database Access) allows you to do that instead. -Matt Fruend DDE / DDA

10 Data Data Data DDE Background Direct Data Export (DDE) Why use DDE? –Export or filter information not easily obtained through the PowerSchool interface –Track down data issues (technical staff) Effective management of student data via database interface requires: »Knowledge of data elements »Knowledge of table relationships

11 Data Data Data DDE Background data elements Data are stored for efficiency; not convenience Foreign key naming (most of the time) –The letters ID are added to the name of the field Examples / foreign keys: –TermID is stored internally as a # in all feeder tables and the term name is defined in Terms –SchoolID is stored internally as a # in all feeder tables and the school name is defined in Schools –StudentID is stored internally as a # in all feeder tables and the students name is defined in the Student table

12 Data Data Data DDE Background data elements Knowing which primary keys are stored as a foreign key in a related table allows the DDE user to export information that makes sense (ie Semester 1 instead of 1601) There are some caveats to the foreign key naming. An example… –The Sections table has a field called Teacher. It contains the ID of the Teacher; not the teacher name.

13 Data Data Data DDE Background data elements Another example of storing data for efficiency… lookup values vs. literals: »Examples: »FTE (stored as # but might mean Full Time) »Attendance codes (stored as a # but might mean A for Absent) Another example are defined values that are not stored anywhere; they just are –Enroll_status in the student table »0 = active, 2 = transferred, etc.

14 Data Data Data DDE Background data elements Related tables How to link up tables Next slide will show an example of the CC (enrollment) table and related tables.

15 Data Data Data Enrollment table

16 Data Data Data DDA What is DDA? –Ability to modify/delete data Who needs to use DDA? –Authorized technical support contacts Why would you want to use DDA? –Fix corrupt data as a result of a system bug or a user error –Some use it as a quick fix without regard to related table data. Can cause bigger problems! Recommendation –Give at most 1 person in your district access to DDA

17 Data Data Data Exporting out of DDE Live examples of getting data from Powerschool with DDE

18 Data Data Data Pivot tables Allows analysis of vast amounts of data into concise views Who is the target audience? DDE exports provide the source for these tables Important note: Pivot tables are built on static data sets… But there is a way for them to be dynamic…

19 Data Data Data Pivot tables – building a dynamic pivot table Dynamic pivot tables start with a data set defined with a named range and a formula that will ebb and flow with number of rows in the range. =OFFSET({sheetname}'!$A$1,0,0,COUNTA('{sheetname}'!$A:$A),COU NTA('{sheetname}'!$1:$1)) {sheetname} refers to the sheet that the data resides in. Note: 2007 Excel allows you to change a data source range, but it is not dynamic. You have to change the range each time rows grow and shrink

20 Data Data Data Other ways to get at data… Match Function This is one of the more under-utilized features in the Powerschool admins data mining arsenal…

21 Data Data Data Data are stored in individual buckets that are specific to a functional area within the system. Each bucket of information (table) has connectors to other buckets of information (table) so that the data makes sense. The Match functions works by being able to extract related data that is associated from one table to another related table. This is one of the more under-utilized features in the Powerschool admins data mining arsenal… Match Function

22 Data Data Data Match function overview… Process: Start with the Source table – filter the selection for which you want the match Go to the Target table – select all… Then Match to the table that holds the selection for which the match is to happen. note: there must be a relationship between the tables Match Function

23 Data Data Data Match back to the Student table… If the result of a Match function is student centric, and you want the ability to manage the group (browse, create a stored selection), perform a Match back to the Student table… Powerschool maintains the current selection from DDE to the front page of the application for the user performing the Match function… Match Function Exercise StoredGrades -> Student

24 Data Data Data Resources Excel Pivot table –http://www.ozgrid.com/Excel/PivotTables/ExCreatePiv1.htmhttp://www.ozgrid.com/Excel/PivotTables/ExCreatePiv1.htm Informing Practices and Improving Results with Data-Driven Decisions –http://www.nsba.org/site/docs/9200/9154.pdfhttp://www.nsba.org/site/docs/9200/9154.pdf


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