astronomy

Said Hadjerrouit

Said Hadjerrouit is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Said Hadjerrouit rather than just read about it. In short: Said Hadjerrouit is a professor of informatics and mathematics education at the University of Agder in Kristiansand, Norway. Education Hadjerrouit received a master's degree in 1985 in software engineering from the Technische Universität Berlin, Germany.

Key takeaways

Said Hadjerrouit belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Said Hadjerrouit to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Said Hadjerrouit from memory before moving on to harder problems.

Reference excerpt

Said Hadjerrouit is a professor of informatics and mathematics education at the University of Agder in Kristiansand, Norway.

Education Hadjerrouit received a master's degree in 1985 in software engineering from the Technische Universität Berlin, Germany. In 1992, he received his doctoral degree in engineering in the field of medical expert systems and artificial intelligence.

Career Hadjerrouit worked as an assistant at the Technische Universität Berlin between 1985 and 1990. His teaching in Berlin focused mostly on informatics and society, philosophical and ethical issues of computing, and computers in developing countries. In 1991, he accepted a position at the Institute of Electronic Data processing at the University of Agder. In 1994, Hadjerrouit was appointed an associate professor at the Department for Mathematical Sciences at the same university, teaching object-oriented programming, Web engineering, software development, and databases. Between 2004 and 2008, Hadjerrouit focused on Computer Science Education. In 2008, Hadjerrouit started to work in the field of mathematics education and use of digital tools in teaching and learning mathematics and has, since 2014, been reaching the "Theories in the Learning and Teaching of Mathematics" course. Between 2020 and 2024, Hadjerrouit led the PhD committee for Specialisation in Mathematical Sciences. Hadjerrouit is a member of the Informing Science Institute, and of the Agder Academy of Sciences and Letters. He also served on the editorial review board of the Interdisciplinary Journal of E-Learning and Learning Objects. As of 2026, Hadjerrouit is a professor of informatics and mathematics education at the University of Agder. He received an “Outstanding Paper Award” for a paper he presented at the IADIS e-Society 2012 conference in Berlin.

Selected publications Hadjerrouit has authored or co-authored over 170 publications, among which are:

Afram, O.O.; Hadjerrouit, S., & Monaghan, J. (2026). Analysing group interaction sequences in technology-mediated mathematical modelling activities. Mathematics Education Research Journal. ISSN 1033-2170. https://doi.org/10.1007/s13394-026-00568-1 Afram, O.O.; Hadjerrouit, S., & Monaghan, J. (2026). Students’ proclivity in using particular digital tools in mathematical modelling activities: an activity and affordance theoretical perspective. International Journal of Mathematical Education in Science and Technology. ISSN 0020-739X. pp. 1–32. https://doi.org/10.1080/0020739X.2025.2598244 Afram, O.O., & Hadjerrouit, S. (2025). Social affordances in students’ mathematical modelling with digital tools. NOMAD – Nordisk matematikkdidaktikk. ISSN 1104-2176. 30(4), pp. 166–194. https://doi.org/10.7146/nomad.v30i4.164209 Hansen, N. K., &; Hadjerrouit, S. (2024). Supporting Students’ Mathematical Problem Solving Through Computational Thinking and Programming: A Use-Modify-Create Approach. Artificial Intelligence for Supporting Human Cognition and Exploratory Learning in the Digital Age. Cognition and Exploratory Learning in the Digital Age. ISBN 978-3-031-18512-0. Springer Nature, pp. 203-219. Hansen, N. K., &; Hadjerrouit, S. (2023). Analyzing Students’ Computational Thinking and Programming Skills for Mathematical Problem Solving. Open and Inclusive Educational Practice in the Digital World. ISBN 978-3-031-18512-0. Springer Nature, pp. 155–173. Stigberg, H.; Hadjerrouit, S.; Kaufmann, O. T.; Marentakis, G. (2022). Analysing tensions faced by pre-service mathematics teachers engaging in digital fabrication. Proceedings of the 45th Conference of the International Group for the Psychology of Mathematics Education (PME 45). ISBN 978-84-1302-178-2. Universidad de Alicante, pp. 4–51 - 4-58. Fleischmann, Y.; Gueudet, G.; Hadjerrouit, S.; Nicolas, P. (2020). Tertiary education in the digital age. International Network for Didactic Research in University Mathematics: INDRUM 2020;Volume 3, pp. 29–46. Hadjerrouit, S. (2020). Exploring the Affordances of SimReal for Learning Mathematics in Teacher Education: A Socio-Cultural Perspective. I: Computer Supported Education. 11th International Conference, CSEDU 2019, Heraklion, Crete, Greece, May 2–4, 2019, Revised Selected Papers. Springer Nature 2020, pp. 26–50. Fredriksen, H., & Hadjerrouit, S. (2020). Exploring engineering students’ participation in flipped mathematics classroom: A discursive approach. Nordisk matematikkdidaktikk 2020; Volum 25.(1), pp. 45–64. Fredriksen, H., & Hadjerrouit, S. (2019). An activity theory perspective on contradictions in flipped mathematics classrooms at the university level. International Journal of Mathematical Education in Science and Technology 2019, pp. 1–11. Hadjerrouit, S. (2017). Assessing the Affordances of SimReal+ and their Applicability to Support the Learning of Mathematics in Teacher Education. I: Issues in Informing Science and Information Technology (IISIT), pp. 121–138. Informing Science Institute, https://doi.org/10.28945/3692 Hadjerrouit, S.(2015). Assessing the Level of Collaborative Writing in a Wiki-Based Environment: A Case Study in Teacher Education. I: Competencies in Teaching, Learning and Educational Leadership in the Digital Age. London: Springer Verlag, 197-216. Hadjerrouit, S.(2014). Wiki as a Collaborative Writing Tool in Teacher Education: Evaluation and Suggestions for Effective Use. Computers in Human Behavior; Volume 32, 301-312. Hadjerrouit, S.(2010). Developing Web-Based Learning Resources in School Education: A User-Centered Approach. Interdisciplinary Journal of E-Learning and Learning Objects, Volume 6, pp. 115–135. Hadjerrouit, S. (2009). Teaching and Leaning School Informatics: A Concept-Based Pedagogical Approach. Informatics in Education, Volume 8, No. 2, pp. 227–250.

References

Worked examples

Example 1 — a first encounter with Said Hadjerrouit

Start with the simplest possible case. Write down what Said Hadjerrouit claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Said Hadjerrouit before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Said Hadjerrouit ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Said Hadjerrouit

In research: Said Hadjerrouit appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Said Hadjerrouit in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Said Hadjerrouit is common in secondary-school and first-year university syllabi. It links to neighbouring topics Artificial intelligence researchers, Living people, Mathematics educators, so understanding it makes those chapters shorter.
In everyday life: Look for Said Hadjerrouit outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Said Hadjerrouit in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Said Hadjerrouit means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Said Hadjerrouit out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Said Hadjerrouit in simple terms?

Said Hadjerrouit is a professor of informatics and mathematics education at the University of Agder in Kristiansand, Norway. Education Hadjerrouit received a master's degree in 1985 in software engineering from the Technische Universität Berlin, Germany.

Why does Said Hadjerrouit matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Said Hadjerrouit?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Said Hadjerrouit.