Top 100 presentations

1. Continuous Verb Tenses
   34992
2. Support and transport in plants
   33567
3. Anyong Tubig Anyong Lupa sa Asya
   29127
4. Elements compounds and mixtures
   25801
5. Chromosome
   21594
6. Simple Verb Tenses
   20660
7. Balancing Chemical Equations. Balancing redox equations
   19895
8. Atomic Structure
   19828
9. Periodic Behavior
   19738
10. Newton’s laws of motion
    18629
11. Periodic Trends
    16645
12. Adverbs
    16563
13. Percent Composition, Empirical and Molecular Formulas
    15892
14. Animal Farm
    15605
15. Bonding, Molecular Shape & Structure
    14545
16. MakingFood
    13243
17. Circulation and Gas Exchange
    13163
18. DNA - An overview
    12790
19. Fungi
    12715
20. Atomic Structure and Periodic Trends
    12636
21. Volumetric
    12519
22. Feminism- Cure or Curse
    12424
23. Atomic Structure and Periodicity
    12301
24. Hormones and the Endocrine System
    11902
25. Derivation Applications of Bernoulli Principal
    11738
26. Animal Development
    11723
27. Osmoregulation and Excretion
    11217
28. Plasma Membrane-Gateway to the Cell
    10644
29. Plant Structure, Growth, and Development
    10481
30. Acid, bases and salts
    10028
31. Development
    9989
32. Mirrors and Lenses
    9942
33. Structure of the Atom
    9800
34. Balanced forces
    9771
35. Pronouns
    9664
36. Mass Spectrometry
    9662
37. Nouns
    9574
38. Ancient Civilizations
    9545
39. Forests
    9256
40. Resource Acquisition and Transport in Vascular Plants
    9210
41. Support and transport in plants
    9202
42. Atomic Structure
    9172
43. Cell Types and Cell Structure
    8910
44. Newton’s third law of motion
    8789
45. Animal Nutrition
    8526
46. Transplantation Immunology
    8455
47. Cellular respiration
    8376
48. Growing Plants
    8185
49. Electrical Circuits
    8133
50. Sensory and Motor Mechanisms
    8096
51. Prepositions
    7900
52. Lab Equipment
    7896
53. Plant Responses to Internal and External Signals
    7870
54. Viruses, Viroids, and Prions
    7750
55. Neurons, Synapses, and Signaling
    7689
56. Of Mice and Men
    7676
57. Basic Structure of a Cell
    7543
58. Covalent Bonding (Molecules)
    7495
59. Plant structure adaptations and responses
    7471
60. Real time PCR and it's functions in diagnosis
    7463
61. A Tour of the Cell
    7459
62. Ionic Bonding
    7367
63. Cellular Division
    7270
64. To Kill a Mockingbird
    6953
65. Mendelian Genetics
    6938
66. Blood Type Genetics
    6912
67. Satellite Orbits and Uses NIS
    6867
68. Molecules and Ions
    6839
69. Well logging The Bore Hole
    6775
70. The Immune System
    6632
71. Sound
    6574
72. Membrane Structure and Function
    6552
73. Animal Reproduction
    6516
74. Rocks
    6493
75. The Chemistry of Acids and Bases
    6492
76. Angiosperm Reproduction and Biotechnology
    6462
77. Plant Diversity
    6417
78. Balancing Chemical Equations
    6394
79. Cell Communication
    6306
80. Mendel and the Gene Idea
    6299
81. Rate Laws
    6263
82. Drama
    6229
83. Hybridization of Orbitals
    6219
84. Introduction to Oscillations and Simple Harmonic Motion
    6155
85. Empirical Formula
    6116
86. The Building Blocks of Matter Atoms
    6116
87. Electron Quantum Numbers
    6076
88. Translation. Protein from RNA
    6039
89. Neurons
    5947
90. An Introduction to Metabolism
    5932
91. The Mole
    5838
92. The Structure and Function of Large Biological Molecules
    5788
93. Cell Membrane + Tissues & Organs Definitions
    5781
94. Karyotypes
    5770
95. ADP, ATP and Cellular Respiration
    5747
96. Earthquakes
    5733
97. Endocrine System
    5717
98. Photosynthesis
    5614
99. Conjunction
    5551
100. Classical greek philosophy
     5541

Research and Development, Experimental aerospace engineering center in Serbia (Space Technologies)