1-
2- Abu ,M .S ,Ali, M.B, Hock ,T.T(2012) : Assisting Primary School Children to Progress through their Van Hieles Levels of Geometry Thinking Using Google Sketch up , Procedia- Social and Behavioral Sciences , 64(9) , PP75-84 .
3- Altakh Yneh , B (2018) : Levels of Geometrical Thinking of Students Receiving Blended Learning in Jordan , Journal of Edu learn, 12(2), 159-165.
4- Breen, J, J (1999) : Achievement of Van Hiele Level two in geometry thinking by eighth – grade Students through the use of geometry Computer – based guided instruction, P h .D , Boston College , University of South Dakota .
5- Bulut , N, Bulut , M(2012) : Development Pre- Service Elementary Mathematics Teachers Geometric Thinking Levels Through an undergraduate Geometry Course , Procedia- Social and Behavioral Sciences, 46, 760-763.
6- Cathy.A.B& Saundra.C(2001) : Geometry through Bead work Designs , Teaching Children Mathematics , 7 (6) , 360-390.
7- Cobern , W (1993) : Contextual Constructivism : The impact Culture on Learning and teaching , Science Education Journal ,2(2) , 36-60
8- Corder, G; Foreman, D. (2009): Nonparametric statistics for non-statisticians A Step-by- Step Approach. USA. New Jersey: john Wiley & Sons. Sons , Hoboken.
9- Chang ,K (2007) :Developing Geometry Thinking through Multimedia Learning Activities , Computers in Human Behaviour Journal , 23(1) , 212-229.
10- Choi – Koh , S (2001) : Astudents Learning of geometry using the Computer , the Journal of Educational Research , 92(5) , 301-311.
11- Duatepe – Paksu , A, Ubuz,B (2009) : Effects of Drama – Based Geometry Instruction on student Achievement , Ahitudes and Thinking Levels , The Journal of Educational Research ,102(4), 272-287 .
12- Enchang , K, Ting Sung , Y , Ying Lin, S (2007) : Developing geometry Thinking through multimedia Learning activities , Computersim Human Behavior , 23(5) , PP2212-2229 .
13- Field, A. (2009). Discovering Statistics Using SPSS, Third Edition, London: SAGE Publications Ltd.
14- Haviger, J , Vojkuvkova , I (2014) : The Van Hiele Geometry thinking Levels Genderand School Type Difference , Procedia- Social and Behavioral Sciences, 112, 977-981.
15- Johnston , P; Wilkinson, K (2009). Enhancing Validity of Critical Tasks Selected for College and University Program Portfolios. National Forum of Teacher Education Journal, (19) 3 ,
16- PP1-6.
17- Linda , F (1992) : Meta Cognition and the Van Hiele model of thinking in geometry , Ph.D , College of Education , Georgia State University .
18- Marques, J. (2007). Applied Statistics Using SPSS, Statistica, Matlab and R, Second Edition, Springer-Verlag Berlin Heidelberg.
19- Maureen , S.D ( 1994) : The development of Young Children s geometry thinking in mediated Kindergaten Classroom environment , Ph.D , State University of New York at Buffalo , United States .
20- Mistretta , R.M (2000) : Enhancing geometric reasoning Adolescence, The Journal of Educational Research , 35(138), 365-379.
21- Pallant, J. (2007). SPSS Survival Manual A Step by Step Guide to Data Analysis using SPSS for Windows, third edition, England: McGraw-Hill Education.
22- SPSS Inc. (2004). SPSS 13.0 Base User's Guide, Chicago: SPSS Inc.
23- Tieng , P.(2014) : Improving Students Van Hiele level of Geometric Thinking Using Geometer Sketch pad , The Malaysian on line Journal of Education Technology , 2(3) , 20-30.
24- Walsh , S,(2000) : The Effect of using Fish Bones Strategy in teaching Biology Comparing With the traditional methods , unpuplished doctorate dissertation,university of Faraj , America .