Top 100 presentations

1. Continuous Verb Tenses
   35555
2. Support and transport in plants
   34000
3. Anyong Tubig Anyong Lupa sa Asya
   29582
4. Elements compounds and mixtures
   26167
5. Chromosome
   22333
6. Simple Verb Tenses
   20883
7. Atomic Structure
   20426
8. Balancing Chemical Equations. Balancing redox equations
   20302
9. Periodic Behavior
   19991
10. Newton’s laws of motion
    19027
11. Periodic Trends
    16801
12. Adverbs
    16687
13. Percent Composition, Empirical and Molecular Formulas
    16051
14. Animal Farm
    15907
15. Bonding, Molecular Shape & Structure
    14871
16. Circulation and Gas Exchange
    13622
17. MakingFood
    13524
18. DNA - An overview
    13272
19. Atomic Structure and Periodic Trends
    13084
20. Fungi
    12978
21. Volumetric
    12802
22. Atomic Structure and Periodicity
    12621
23. Feminism- Cure or Curse
    12603
24. Hormones and the Endocrine System
    12368
25. Animal Development
    12281
26. Derivation Applications of Bernoulli Principal
    11976
27. Osmoregulation and Excretion
    11663
28. Plant Structure, Growth, and Development
    10900
29. Plasma Membrane-Gateway to the Cell
    10894
30. Acid, bases and salts
    10439
31. Development
    10338
32. Mirrors and Lenses
    10279
33. Structure of the Atom
    10016
34. Balanced forces
    9992
35. Ancient Civilizations
    9905
36. Resource Acquisition and Transport in Vascular Plants
    9818
37. Mass Spectrometry
    9815
38. Pronouns
    9794
39. Nouns
    9764
40. Support and transport in plants
    9467
41. Forests
    9444
42. Atomic Structure
    9391
43. Newton’s third law of motion
    9041
44. Cell Types and Cell Structure
    9030
45. Animal Nutrition
    8859
46. Transplantation Immunology
    8726
47. Cellular respiration
    8572
48. Sensory and Motor Mechanisms
    8507
49. Growing Plants
    8470
50. Plant Responses to Internal and External Signals
    8382
51. Electrical Circuits
    8315
52. Lab Equipment
    8119
53. Neurons, Synapses, and Signaling
    8048
54. Prepositions
    8024
55. Viruses, Viroids, and Prions
    7969
56. Of Mice and Men
    7922
57. A Tour of the Cell
    7909
58. Basic Structure of a Cell
    7722
59. Real time PCR and it's functions in diagnosis
    7699
60. Covalent Bonding (Molecules)
    7633
61. Cellular Division
    7594
62. Plant structure adaptations and responses
    7588
63. Ionic Bonding
    7495
64. Mendelian Genetics
    7189
65. To Kill a Mockingbird
    7141
66. Sound
    7137
67. Satellite Orbits and Uses NIS
    7120
68. Blood Type Genetics
    7073
69. The Immune System
    6991
70. Well logging The Bore Hole
    6982
71. Molecules and Ions
    6963
72. Membrane Structure and Function
    6908
73. Animal Reproduction
    6869
74. The Chemistry of Acids and Bases
    6821
75. Angiosperm Reproduction and Biotechnology
    6821
76. Mendel and the Gene Idea
    6738
77. Plant Diversity
    6720
78. Cell Communication
    6681
79. Rocks
    6657
80. Balancing Chemical Equations
    6558
81. Rate Laws
    6420
82. Introduction to Oscillations and Simple Harmonic Motion
    6408
83. Drama
    6388
84. Hybridization of Orbitals
    6368
85. The Building Blocks of Matter Atoms
    6351
86. An Introduction to Metabolism
    6294
87. Empirical Formula
    6252
88. Electron Quantum Numbers
    6229
89. The Structure and Function of Large Biological Molecules
    6123
90. Translation. Protein from RNA
    6116
91. Neurons
    6104
92. Photosynthesis
    6059
93. The Mole
    5943
94. Cell Membrane + Tissues & Organs Definitions
    5938
95. Earthquakes
    5890
96. Karyotypes
    5863
97. ADP, ATP and Cellular Respiration
    5845
98. Population Ecology
    5783
99. Classical greek philosophy
    5778
100. Endocrine System
     5773

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