Charalampos  Lemonidis Author of Evaluating Organization Development
FEATURED AUTHOR

Charalampos Lemonidis

professor
University of Western Macedonia

Charalampos Lemonidis is a professor of Mathematics Education at the Department of Primary Education - University of Western Macedonia (Florina, Greece). He has graduated from Department of Mathematics - Aristotle University of Thessaloniki. He received a master and a Ph.D. in Didactic of Mathematics from the University of Luis Pasteur (France). He is director of the Postgraduate Program in Department of Primary Education. He has founded the school entitled “Nature and Life Mathematics”.

Biography

CURRICULUM VITAE

Dr Charalampos Lemonidis is a Professor of mathematics education at the Department of Primary Education - University of Western Macedonia  (Florina, Greece) ( www.uowm.gr ).
Email: [email protected], [email protected]
Telephone: 23850-55021, mobile telephone: 6972034997  

Academic Qualifications
He has graduated from:  
Department of Mathematics - Aristotle University of Thessaloniki.
He holds master degree:
Master in Didactic of Mathematics – University of Luis Pasteur (France)  
He received a Ph.D. in Didactic of Mathematics from the University of Luis Pasteur (France) (1990).

Professional Experience
Dr. Charalambos Lemonidis has a long teaching and academic experience. In detail:
2010-today: Dean elected in the Faculty of Pedagogy in Florina at the University of Western Macedonia.  
2004-today: Professor of didactics of mathematics at the Department of Primary Education at the University of Western Macedonia.
Taught the following courses at Undergraduate level:
a) Didactic of mathematics
b) Teaching Methodology and training in Mathematics
c) Mathematics for prospective teachers
d) Design of educational material and teaching mathematics with technology.
2006-2008: Visitor Professor at the School of Educational Studies- University of Cyprus. He taught the following courses at Undergraduate level:
a) Bases and basic concepts of mathematics
b) Issues of modern mathematics
c) Special issues of didactics of mathematics    
2000-2004: Associate Professor at the Department of Primary Education at the Aristotle University of Thessaloniki.
1995-1999: Assistant Professor at the Department of Primary Education at the Aristotle University of Thessaloniki.
1992-1995: Special Scientist, lecturer at the Department of Primary Education at the Aristotle University of Thessaloniki.

Moreover, since 1996 until today he has been teaching and has lectured the following  Postgraduate Courses in Postgraduate Programs:
1996-today: Postgraduate Course at the University of Western Macedonia, Department of Primary Education:  
a) Language and mathematics.    
b) Instructional research in the first mathematics’ concepts. Curricula and textbooks.
c) Statistic in educational research with the SPSS program.
d) Hypermedia and their application in education.
e) Modern subjects in mathematics education.
f) Teaching mathematics with technology
g) Learning difficulties and teaching/learning of mathematics.  

2006-2008: Visitor Professor at the School of Educational Studies- University of Cyprus. He taught the following courses at Postgraduate level:
a) Modern research in mathematics education.
b)  Cognitive point of view of the analysis of mathematics learning

Additionally, he was supervisor of five PhD at the University of Western Macedonia.
Ηe  supervised 21 Master committees  at the University of Western Macedonia.

He has founded the school entitled “Nature and Life Mathematics”.

In 1996 Ch. Lemonidis founded, at the Department of Primary Education - University of Western Macedonia,  the scientific school for mathematics education entitled «Nature and Life Mathematics». The principal objective of this school is the modernization of teaching and learning of school mathematics. The group of this school consisted: of scientists of mathematics education, epistemology and history of mathematics, statistic, developmental psychology, social pedagogy, of PhD and postgraduate students and of schools’ teachers.    
The title “Nature and Life mathematics” is chosen because great emphasis is given to the contents and contexts in with math teaching takes place. They are contexts concerning everyday life situations and including nature, culture, history of mathematics, etc. in a way to motivate students. Teaching is developed based on preexisting knowledge of the students who are invited to discover and construct knowledge by themselves in a communicative environment.
Same activities of this school are:
a) Textbooks for grades 1, 2 and 3.
b) “Nature and Life Mathematics” competition
c) Teachers’ network of Nature and Life Mathematics
The basic perceptions and principles for the teaching and learning of mathematics, but also more information are presented on the site: http://mathslife.eled.uowm.gr/

“Nature and Life Mathematics” competition

A math competition has been held every year since 2005. In this competition participated primary school students of 5 and 6 grade. The Primary schools of 6 towns in the region of Western Macedonia, where the university is located, participate in this competition, which aims at helping student developing a positive attitude towards mathematics. The subjects of the competition are usually real problems with the contents from the daily life. The aim is to develop the critical mathematic thinking and not the formal application of mathematical knowledge. Every year the competition is dedicated to an important mathematician, the life and works of whom are presented to the student-participants and their parents. Most details for the competition, you can be found on the site:  http://mathslife.eled.uowm.gr/

Teachers’ network of Nature and Life Mathematics

We have established at internet a Forum for teachers’ training in mathematics education in the address: http://www.uowm.gr/mathslife/. The main objective of this forum is, to communicate and to disseminate, in the daily practice of education, the results of research in mathematics education that are produced in our University. Via this network the teachers are trained in the modern methods of teaching of mathematics and the students are profiting from a more qualitative teaching. Same subject areas of teachers’ training in the Forum are: mental calculation in all grades of elementary school and innovations in the teaching of class grade 1.
    
Publications  
He has published four books and three series of textbooks and he has been author and co-author of 80 papers in International and Greek journals, collected editions and Conference Proceedings.  

Books
1. Lemonidis, Ch. (1990). Conception, réalisation et résultats d'une expérience d'enseignement de l'homothétie. Ph.D Thèse, I.R.E.M. de Strasbourg, p. 315. Strasbourg, France.
2. Lemonidis, Ch. (1994). Walk in the Learning of Elementary Arithmetic. Thessaloniki: Kyriakidis Bros. p. 240.
3. Lemonidis, Ch. (2000). Elements of Arithmetic and Numbers’ Theory for the Teacher. Athens: Patakis Publications, p.195.
4. Lemonidis, Ch. (2003).  A new proposal for teaching Mathematics in the first grades of Elementary School. Athens: Patakis Publications, p. 235.
5. Lemonidis, Ch. (2013).  Natur and Life Mathematics. Mental calculations. Thessaloniki: Zygos Publications, p. 440.
6. Lemonidis, Ch. (2015). Mental Computation and Estimation: Implications for mathematics education research, teaching and learning. Routledge, p. 250.


Textbooks for grades 1, 2 and 3. “Nature and Life Mathematics”.
“Nature and life mathematics” is a name that expresses a perception of the teaching of Mathematics, developed in the Department of Primary Education in Florina by Charalambos Lemonidis. Aiming mainly at updating mathematics education, research was conducted and educational material was designed. The new math textbooks for 1st, 2nd and 3rd grades of Greek Primary School are included in this material. The textbooks for 1st and 3rd grade are the official math textbooks, taught all over Greece for the academic year 2006-2007. They were used and tested for many years in University’s experimental schools. Their writing was based on research in many pupils and involved the participation and training of many teachers. The main results of research on these new math textbooks are presented in the book: Lemonidis, Ch., (2003), “A new proposal for teaching Mathematics to the first grades of Elementary School” (4).
The main characteristic of these textbooks is the connections made between mathematics and everyday life. Thus, the contexts used for teaching mathematics concern nature, animals, the protection of the environment, culture, the history of mathematics, etc. Their philosophy resembles with many of the principles of Realistic Mathematics developed in the Netherlands. “Nature and Life Mathematics” also contributed to the updating of the math curriculum in Greece, on which the new books were based.

1. Lemonidis, Ch., Kapsalis, A., Pnevmatikos, D., Theodorou, A. (2006).  Mathematics for 1st grade of Elementary School. Teacher’s Book. P. 160. Student’s Book. P. 140. Student’s workbook. P. 140. Letters to parents. Booklets of evaluation. Publication of the Greek Ministry of Education. [In Greek]
2. Lemonidis, Ch., Theodorou, E., Nikolantonakis, K., Panagakos, I., Spanaka, A., (2006).  Mathematics for 3rd grade of Elementary School. Teacher’s Book. P. 170. Student’s Book. P. 150. Student’s workbook. P. 150. Letters to parents. Booklets of evaluation. Publication of the Greek Ministry of Education. [In Greek]
3. Lemonidis, Ch., (2007). Mathematics for 2nd grade of Elementary School. Teacher’s Book.P. 286. Student’s Book- Student’s workbook. P. 258. Letters to parents. Booklets of evaluation. Publications Ellinika Grammata [in Greek]
The first two packs of educational material – Mathematics for 1st and 3rd grade – were selected after a competition and an evaluation process organized by the Greek Ministry of Education and they are used in all Greek schools since 2006-2007. The third pack of educational material was published and circulates privately.

Certain publications and research achievements per subject areas

Learning disabilities and new perspectives in the teaching of mathematics and prospective teachers training  

The following investigations presented behaviours of students with difficulties in mathematics and learning disabilities on the issues such table of multiplication, multiplication and mental calculations. Also investigated the effectiveness of technology use for these students to solve problems [74, 66, 62, 59]. There is research with contemporary views on the teaching of mathematics and training of perspective teachers such as “the  Nature and Life Mathematics” and teaching in realistic context [68, 60, 56, 51, 43, 39, 38, 37, 34], the Ethnomathematics [47, 36], the story-based learning in mathematics [75, 73], the multicultural dimension in the teaching of mathematics [64, 57].  In addition, some studies are presented related to the education and training of perspective teachers in self-assessment [71] and behaviors of students in contemporary concepts of curriculum, like mental calculations and geometry [58, 48].  
75. Lemonidis Ch., Kaiafa, I. (2012). Creating, implementing and evaluating story-based learning text for teaching fractions. Proceedings of 1st International Conference “Education across borders”, organized by the University of Western Macedonia-Greece, the "Fan S. Noli" University of Korce-Albania and the University of Bitola-FYROM. Florina. 2012 (Under publication).
74. Fragidou, R., Lemonidis Ch., (2011). Behaviors of high school’s students with learning disabilities and bilingual, in multiplication situations. Proceedings of 3rd National Congress of Science Education, Athens, 2-5 June 2011.
73. Lemonidis Ch., Kaiafa, I. (2011). Views and experiences of perspectives, teachers about the teaching of mathematics using story-based learning. Proceedings of 4th Congress of Union of Mathematics Education Researchers (ENEDIM). Pp. 303-312, Ioannina.
71.  Lemonidis, Ch., Arsenis, K., Markadas, S. (2011). Self-assessment reflective skills of perspective teachers in their teachings of mathematics. Proceedings of 4th Congress of Union of Mathematics Education Researchers (ENEDIM). Pp. 283-292, Ioannina.
68. Ch. Lemonidis, (2010). Nature and Life Mathematics. Theoretical principles and choices in grade 1 and 3 school books of mathematics of elementary school. Collective volume. Didactic of Mathematics: Theoretical and Inquiring Approaches. (Eds) Sakonidis, Ch., et al. (Under publication).


66. Ch. Lemonidis, M. Avgerinos (2010). Using a software presenting addition problems in a realistic way: results in pupils and teachers. 13th International Conference ICT in the education of the Balkan countries Varna, June 17 - 19, 2010. Balkan Society for Pedagogy and Education.
64. Mihail, Ε., Sofocleous, P., Lemonidis Ch., (2009). The multicultural dimension of multiplication: Attitudes and perceptions of Cypriote teachers for his use in the teaching of Mathematics.  Proceeding of 5th International Conference of Mathematics Education. Volume 1, p. 17-29. University of Crete. Rethimno.  
62. Lemonidis, Ch.,  Pantsiou, E.,  Anastasiou, D. (2009). Les tables de multiplication pour des élevés en difficulté en mathématiques: connaissances et comportements. Premier Colloque Franco-Chypriote de Didactiques des Mathématiques, p. 35-48. Lefkosia, Cyprus.  
60. Lemonidis, Ch., Panagiotopoulos, I., Nikolantonakis, K., (2009). Les enseignants grecs face aux problèmes réalistes. -  Les caractéristiques des enseignants qui influencent les réponses réalistes. Annales de Didactiques et de Sciences Cognitives vol. 14, pages  195 – 212. IREM de Strasbourg, France.
59. Lemonidis, Ch., Ligouras, G., (2009). The effect of social background on third grade pupils’ mental calculations. Mediterranean Journal for Research in Mathematics Education. Vol. 8, no 2, pp. 81-100. Nicosia, Cyprus.  
58. Lemonidis, Ch. (2008). Longitudinal study of mental calculation development in the first two grades of primary school. International Journal for Mathematics in Education. Hellenic Mathematical Society, Volume 1, pp. 47-68. Athens.
57. Nikolantonakis, K., Lemonidis, Ch. (2008). Multiculturalism, History of Mathematics and Schoolbook of the third class in Primary School in Greece. J.F. Matos, P. Valero & K. Yasukawa (Eds.) Proceeding of the Fifth International Mathematics Education and Society Conference. Lisbon, Aalborg University, pp. 398-405.
56. Lemonidis, Ch. (2008). Prospective teachers’ application of the mathematical concept of proportion in real life situations. Conference in Five Cities: Nicosia, Rhodes, Bologna, Palermo, Locarno. Research in Mathematics Education. 2008, 163-172.  
51. Lemonidis Ch. (2007). Les comportements des élevés de l’école élémentaire et des futurs enseignants face aux problèmes réalistes. Colloque COPIRELEM  11-13 juin, Troyes 2007.
48. Panaoura, G., Gagatsis, A., Lemonides, Ch., (2007). Spatial abilities in relation to performance in geometry tasks. 5th CERME, Congress of ERME, the European Society for Research in Mathematics Education. 22nd of February to 26th of February 2007, Larnaca, Cyprus.
47. Mihail, Μ., Lemonidis Ch., (2007). Ethnomathematics and patterns’ teaching: an inquiring study on students of grade 5. Proceedings of 9th Cypriot Congress of Mathematic Education and Science, Pafos, 2-4 February, p. 291-302.
44. Lemonidis Ch., Kolliniati, Β. (2007). Nature and Life Mathematics.  Changes in the work of mathematics teacher.  Proceedings of 9th Cypriot Congress of Mathematic Education and Science, Pafos, 2-4 February, p. 39-49.  
43. Lemonidis Ch. (2007). The modernization of mathematics contents in the new textbooks of grade 1 and grade 3 of Elementary School. Bridges, 31:24-31.
39. Lemonidis, Ch., Tsakiridou, H. Kapsalis, Ch., (2006). Mathematical Knowledge level of Primary Education Department students. 3rd International Conference on the Teaching of Mathematics at the Undergraduate Level (ICTM 3). June 30 – July 5, 2006, Istanbul, Turkey. (Paper no 270).
38. Lemonidis, Ch., Theodorou, Eut., (2006). The development of prospective teachers. Ideas in designing lesson plans in Mathematics. 3rd International Conference on the Teaching of Mathematics at the Undergraduate Level (ICTM 3). June 30 – July 5, 2006, Istanbul, Turkey. (Paper no 326).
37. Lemonidis Ch. (2005). Nature and Life Mathematics: a perception of the teaching of Mathematics. Presentation of a fragmentary example of teachers’ training. Themes in Education, 6:2-3, 161-170. Ellinika Grammata.
36. Theodorou, Ε., Lemonidis Ch. (2005). Ethnomathematics and Geometry: a new interdisciplinary proposal for the teaching of Geometry in the first grade of elementary school. Proceedings of 4 th International Conference of Mathematics Education. University of Crete, Rethimno, p. 221-229.
34. Lemonidis Ch. (2005). Les mathématiques de la nature et de la vie: une conception pour l’enseignement des mathématiques. Présentation d’un exemple extrait de la formation des enseignants. Colloque COPIRELEM 30, 31- Mai, Strasbourg 2005.

Research Achievements
Learning disabilities and teaching / learning of mathematics    
1) Research Project: Training Teachers of Primary and Secondary School in Learning Disabilities
Dates: 2008-2009
Position held:  Teachers’ trainer
Main activities and responsibilities: Training teachers of Primary and Secondary School (mathematicians)
in subject of mathematics education of students with learning disabilities (100 hours)
Organisation of coordination and administration:  University of Thessaly. Department of Special Education.  
Scientifically responsible: Prof. Susana Panteliadou  
Source of Funding: Greek Ministry of Education  (ΥΠ.Ε.Π.Θ) and  European union (ΕΠΕ.ΑΕΚ ΙΙ)

2) Research Project: INVENTION – Specialization of Educators – Special Education Personnel and Production of Educational Material for Mild Mental Retardation.
Dates: 2008
Position held:  Trainer of special schools’ teachers
Main activities and responsibilities: Courses 30 credit hours in the following areas: THE3. The path of integration education. THE4. The education of children with mild mental retardation in the Greek school. THE8. Coupling pedagogy, teaching and new technologies THE9. Configure critical attitude towards the use of computers in special education
Organisation of coordination and administration: New Technologies Laboratory in Communication, Education and Mass Media Department of Communication and Media Studies, University of Athens. http://www.media.uoa.gr/epinoisi
Scientifically responsible: Prof. Mihail Meimaris  
Source of Funding: Greek Ministry of Education (ΥΠ.Ε.Π.Θ) and  European union (ΕΠΕ.ΑΕΚ ΙΙ)

Training teachers to teach Roma students in mathematics
3) Research Project: Education of Roma children in the Regions of Central Macedonia, Western Macedonia and Eastern Macedonia-Thrace.
Dates: 2011-today
Position held:  Teachers’ trainer and construction of educational material
Main activities and responsibilities: Teachers’ trainer of Primary and Secondary School (mathematicians) and construction of educational material for the teaching of Roma children in mathematics.  
Organisation of coordination and administration:  Aristotle University of Thessaloniki    
Scientifically responsible: Prof. Evagelia Tressou  
Source of Funding: Greek Ministry of Education (ΥΠ.Ε.Π.Θ) and  European union (ΕΣΠΑ)

Family’s involvement in the mathematics education    
Parental involvement in children's education is now recognized as an important factor for improving   school effectiveness. Parents can with the acts and omissions, with deeper perceptions and attitudes to strengthen or weaken the efforts of their children to learn, to acquire knowledge, skills and abilities. In these inquiries examined the involvement of the Greek family in the learning of mathematics of their children. Economic, social and cultural characteristics of families were analyzed, discussed in comparison to student performance in mathematics. It seems that the cultural and socioeconomic characteristics of the family have an impact student performance in mathematics.
70. Lemonidis, Ch., Markadas, S., Tsakiridou, E. (2011). A model for determining the parental involvement of Greek parents in their children's education in Mathematics. Research in Mathematics Education. Journal of Union of Mathematics Education Researchers (ENEDIM). Volume 6. Nov. 2011.
61. Lemonidis, Ch., Tsakiridou, E., Markadas, S., (2009). Investigation of the Involvement of Parents in Mathematics Education of their children. Proceedings of 3th Congress of Union of Mathematics Education Researchers (ENEDIM). Mathematics Education and Family Practice. Pp. 89-99, Aegean University.  
42. Pneumatikos, D., Lemonidis Ch., & Pashalidou, D. (2006). The beliefs of parents and teachers about student performance in mathematics. Educational Review, 41, 146-164.
35. Lemonidis Ch., Xatsilami, Μ. (2005). Functional characteristics of the family and numeracy of young children. Proceedings of 4 th International Conference of Mathematics Education. University of Crete, Rethimno, p. 83-92.
24. Lemonidis Ch., Xatsilami, Μ, Kiridis, A.  (2002). The influence of family environment on the young children's numeracy. Educational Review. 34/2002, pp. 121-139.

Representations of first arithmetic concepts
   The handling capacity of semiotic representations of the teacher is very important for differentiated instruction. For students with difficulties in mathematics, the teacher takes care to use empirical and virtual representations made to understand mathematical concepts. In these papers a semiotic analysis of first arithmetic concepts is done according to the theory of different registers developed by R. Duval. The second paper presents behaviours of students, according to the changes of semiotic representations. In the first and third papers prospective schoolteachers are examined with regard to their ability to handle different representations in phenomena of teaching.
72.  Lemonidis Ch., Theodorou, E. (2011). Math activities designed by perspective teachers: a didactic analysis. Proceedings of 4th Congress of Union of Mathematics Education Researchers (ENEDIM). Pp. 293-302, Ioannina.
29. Lemonidis, Ch. (2003). L’enseignement des premières notions arithmétiques selon l’analyse des différentes représentations des quantités. Annales de Didactiques et de Sciences Cognitives vol. 9, (parti 2) des actes du colloque Argentoratum 2002, pages  103 – 117. Strasbourg, France.
26. Lemonidis, Ch. (2003). The representation of quantities of arithmetic concepts and the ability of prospective primary school teachers to handle them. Scientific yearbook of the Psychological Company of Northern Greece, vol. 1, p. 291-308. Publications Ellinika Grammata.[in Greek]

Research Achievements

Two times participation in writing of mathematics curriculum at national level

1) Research Project: Reformulation and modernization of the curricula in mathematics teaching with production of educational material
Dates: 1997 - 1998
Position held:  Member of the Editorial Group of mathematics Curriculum
Main activities and responsibilities: I have participated in the Editorial Group of curriculum for Mathematics of compulsory education from 01/09/1997 until 28/02/1998, when I was the head of the editorial group of the Elementary School.
Organisation of coordination and administration: Greek Ministry of Education (ΥΠ.Ε.Π.Θ)
Source of Funding: Greek State and  European Union (ΕΠΕ.ΑΕΚ ΙΙ)

2) Research Project: “Mathematics Curriculum in Compulsory Education, 2011” "NEW SCHOOL (School 21st Century) - New Curriculum"
Dates: 2010 - 2012
Position held:  Member of the Editorial Group of mathematics Curriculum
Main activities and responsibilities: Expert for the development / drafting of the new Compulsory Education Curriculum. Participation in the Editorial Committee of the Curriculum for Mathematics.
Organisation of coordination and administration:  Greek Ministry of Education (ΥΠ.Ε.Π.Θ)
Source of Funding: Greek State and  European Union (ΕΣΠΑ 2007-2013)

Adults’ mathematics education
3) Research Project: “Second Chance Schools Operational Plan 7, 8 and 9” " Education & Lifelong Learning"
Dates: 2012 - 2013
Position held:  Member of Scientific Committee for upgrading literacy Second Chance Schools
Main activities and responsibilities: My work in this program is: A) Curriculum on the subject of mathematics-literacy. B) Filling-updating of the educational material of the subject - Mathematics Literacy
Organisation of coordination and administration:  Greek Ministry of Education
Source of Funding: Greek State and European Union (ΕΣΠΑ 2007-2013)

Instructor of trainers in the teaching of mathematics with ICT
4) Research Project: “Training of teachers on the use and application of ICT in the instructive practice” "Education & Lifelong Learning "
Dates: 2011
Position held:  I have participated as instructor of trainers
Main activities and responsibilities: I have participated as instructor of trainers (B’ level) of primary education in the teaching of mathematics with ICT (60 hours)
Organisation of coordination and administration:  University Training Center (ΠΑΚΕ) Aristotle University of Thessaloniki - University of Macedonia.
Source of Funding: Greek State and European Union (ΕΣΠΑ 2007-2013)

Inter Universities research project
5) Research Project: Ability to use multiple representations of functions and geometry: The transition from the Gymnasium to high school.
Dates: 2008 -2011
Position held:  Researcher
Main activities and responsibilities: Researcher and representative of the institution of the University of Western Macedonia
Organisation of coordination and administration: Scientific cooperation between the following four vectors: 1. University of Cyprus, 2. University of Aegean, 3. University of West Macedonia, 4. Equire Diderem EA 1547 Université Paris Diderot.
Source of Funding: Cofinanced by the Republic of Cyprus and the European Regional Development EU.

Editor and member of Scientific Committees of Journals
• Editor of the Journal- MENON: Journal of Educational Research, School of Education- University of Western Macedonia.
• Member of the Scientific Committee of the Journal- International Journal for Mathematics in Education. Hellenic Mathematical Society. Athens.
• Member of the Scientific Committee of the Journal- Mediterranean Journal for Research in Mathematics Education.  Cypriot Mathematical Society. Nicosia.
• Member of the Scientific Committee of the Journal- Themes in Science and Technology Education. Electronic journal.  
• Member of the Scientific Committee of the Journal- Research in Mathematics Education. Journal of Union of Mathematics Education Researchers (ENEDIM).
• Member of the Scientific Committee of the Journal- Euclid C. Hellenic Mathematical Society. Athens.

Areas of Research / Professional Expertise

    His scientific interests are focused largely on subjects of Mathematics Education. In detail, he is interested in the role of technology in teaching and learning mathematics as well as the implementation of school curriculum and the educational materials that are used., Moreover, he is passionate about areas associated with mathematical disabilities, professional development and  lifelong learning of mathematics.    

Websites

Books

Featured Title
 Featured Title - Mental Computation and Estimation - 1st Edition book cover