© 2017 Ingo Dahn

# Products

## Results of Recent Work

These are some results if my actual work. They
are provided for free as Open Educational
Resources (OER) under a CC-BY-NC license.
To a large extent, these are aggregations of OER
provided by others. They showcase what becomes
possible when engaged teachers collaborate with
engaged software developers. These are fit for
real life classroom usage and adaptation by non-
technically minded teachers.
## 2020

### MathTrek++

Together with colleagues
from Sweden, the UK and
Austria I started elaborating
a question-centered, socratic, approach to
education. In this approach, students are
encouraged to develop hypothesis and to
evaluate them critically. A series of interactive
documents demonstrates this for models of the
atmosphere.
### Notebook Player

The Notebook Player
converts Jupyter
Notebooks into interactive
web pages the code of which can be edited and
executed in SageCells. These pages require
neither login nor installation of any software.
Their user interface can be fully customized to
meet the students‘ needs.
### COVID-19 Analysis

The COVID-19 pandemic
is an excellent
opportunity for a reality
check of mathematical
epidemiologic models, as in theseinteractive
documents.
•
Mathematical models describing the COVID-19
in Germany
•
Mathematics for the Corona Virus
•
Exponential Regression in Ocatve
•
Comparing the COVID-19 Development in any 2
Countries
### SageCell Doctor

The transition from
using Python 2 to Python
3 as programming language
broke some code used in the
SageCell online computer algebra system. The
SageCell Doctor Page collects broken code
examples and - where available -
recommendations to correct code errors.
## 2019

### Jupyter Notebooks

### for Math Teaching

A summary of
information (in German) on
Jupyter notebooks - what they
are, how they can be dited, how they can be read
and links to some sample notebooks on linear
combinations, , linear approximations and 3
notebooks studying what happens when a 4-
dimensional object passes through our 3-
dimensional world.
### Survey on Online Math Test Systems

Supported by many
colleagues from
academia and industry I
compiled a survey on 11
online Math test systems. It
is intended to support teachers, support units and
system administrators in comparing the systems
and selecting the most appropriate for their use
cases. Besides basic data it provides
implementatations of 5 types of math questions,
from the student‘s and from the author‘s
perspective.
Test-Analyzer
A web site that analyzes
results of tests. After
importing a csv file of
test results, the app detects
problematic questions (for
example: Where do the best students fail?) and
provides advice how problems might be
corrected. A graphical view of score distributions
is included. GDPR safe: No data are sent to the
server; all calculations are done in the web
browser. Currently the Open Source learning
management systems IMathAS and ILIAS are
supported. The system has been developed in
Javascript using Vue..
More Products

### The NetMath Web Site

The NetMath web site (in German) is the
public face of the NetMath community.
NetMath helps its members to utilize
digital media in teaching Math and
Engineering.
### The NetMath Search Engine

The NetMath search engine lets you find
and access free resources from the
NetMath community (mostly in German)
with a single click.
### The IMathAS Math Test System

IMathAS is an Open Source Math test
system developed by David Lippman. I
provide teacher support for its users as
part of my work for the Virtual Campus
Rhineland-Palatinate.