Date of introduction:  1980 Display technology:  LED
New price:   Display size:  8
Size:  6.1" x 3.2" x 1.0"
 155 x 81 x 25 mm3
Weight:  3.4 ounces, 96 grams Serial No:  
Batteries:  9V  Date of manufacture:  
AC-Adapter:   Origin of manufacture:  Hong Kong
Precision:  8 digits Integrated circuits:  
Program steps:   Courtesy of:  Joerg Woerner
Download leaflet:   (DE: 2.3 MByte) Download manual:   (DE: 2.1 MByte)

This ITT S-TRAINER looks at first glance like a simple four-function calculator, but the [PR] and [?] keys suggest an educational toy similiar to the Little Professor or Spelling B.

The S-TRAINER was actually developed in a cooperation between Spectra Lehrmittel-Verlag, a publisher of school textbooks in Germany and ITT. The S-TRAINER is used together with textbooks covering Grade 1 to Grade 6 and featuring dozens of multiple choice questions, each. The student simply enters the [PR]ogram number of each question and the number code of the appropriate answer. The S-TRAINER confirms a correct answer with the green LED and totals them on the 7-segment display before advancing to the next question.

Dismantling the S-TRAINER reveals a design based on a National Semiconductor QuizKid with a 4-bit microcontroller sporting just 1.5k Byte program memory. Main difference with respect to the hardware of the QuizKid is the white connector on the right hand side of the S-TRAINER. Inserting a little "key" allows the use of the S-TRAINER as a basic calculator.

Eight different textbooks of the announced 42 titles are known:

Name Title Grade Description Manual
Biologie 1/1 tbd Biologie
Heft 1 / Sekundarstufe I

(DE: 7.8 MByte)
Deutsch 1/1 tbd Deutsch
Heft 1 / Sekundarstufe I

(DE: 8.2 MByte)
Deutsch 2/1 tbd Deutsch
Heft 2 / Sekundarstufe I

(DE: 7.7 MByte)
Deutsch 3/1 tbd Deutsch
Heft 1 / Sekundarstufe I

(DE: 7.4 MByte)
Deutsch 4/1 tbd Deutsch
Heft 2 / Sekundarstufe I

(DE: 7.2 MByte)
Englisch 1/1   tbd Englisch
Heft 1 / Sekundarstufe I
Geographie 1/1   tbd Geographie
Heft 1 / Sekundarstufe I
Mathematik 1/1 tbd Mathematik
Heft 1 / Sekundarstufe I

(DE: 7.5 MByte)
Mathematik 2/1 tbd Mathematik
Heft 2 / Sekundarstufe I

(DE: 8.2 MByte)
Mathematik 3/1 tbd Mathematik
Heft 3 / Sekundarstufe I

(DE: 7.6 MByte)
Mathematik 4/1 tbd Mathematik
Heft 4 / Sekundarstufe I

(DE: 8.3 MByte)
Physik 1/1   tbd Physik
Heft 1 / Sekundarstufe I

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If you have additions to the above article please email:

Joerg Woerner, April 26, 2012. No reprints without written permission.