Top 100 presentations

1. Continuous Verb Tenses
   35573
2. Support and transport in plants
   34009
3. Anyong Tubig Anyong Lupa sa Asya
   29615
4. Elements compounds and mixtures
   26171
5. Chromosome
   22369
6. Simple Verb Tenses
   20893
7. Atomic Structure
   20435
8. Balancing Chemical Equations. Balancing redox equations
   20319
9. Periodic Behavior
   20000
10. Newton’s laws of motion
    19051
11. Periodic Trends
    16807
12. Adverbs
    16693
13. Percent Composition, Empirical and Molecular Formulas
    16057
14. Animal Farm
    15919
15. Bonding, Molecular Shape & Structure
    14886
16. Circulation and Gas Exchange
    13649
17. MakingFood
    13542
18. DNA - An overview
    13289
19. Atomic Structure and Periodic Trends
    13104
20. Fungi
    12990
21. Volumetric
    12807
22. Atomic Structure and Periodicity
    12631
23. Feminism- Cure or Curse
    12610
24. Hormones and the Endocrine System
    12388
25. Animal Development
    12295
26. Derivation Applications of Bernoulli Principal
    11980
27. Osmoregulation and Excretion
    11687
28. Plant Structure, Growth, and Development
    10913
29. Plasma Membrane-Gateway to the Cell
    10902
30. Acid, bases and salts
    10451
31. Development
    10350
32. Mirrors and Lenses
    10292
33. Structure of the Atom
    10025
34. Balanced forces
    9997
35. Ancient Civilizations
    9911
36. Resource Acquisition and Transport in Vascular Plants
    9835
37. Mass Spectrometry
    9820
38. Pronouns
    9799
39. Nouns
    9771
40. Support and transport in plants
    9477
41. Forests
    9451
42. Atomic Structure
    9400
43. Newton’s third law of motion
    9053
44. Cell Types and Cell Structure
    9032
45. Animal Nutrition
    8867
46. Transplantation Immunology
    8736
47. Cellular respiration
    8578
48. Sensory and Motor Mechanisms
    8525
49. Growing Plants
    8476
50. Plant Responses to Internal and External Signals
    8391
51. Electrical Circuits
    8323
52. Lab Equipment
    8124
53. Neurons, Synapses, and Signaling
    8056
54. Prepositions
    8027
55. Viruses, Viroids, and Prions
    7976
56. A Tour of the Cell
    7938
57. Of Mice and Men
    7930
58. Basic Structure of a Cell
    7732
59. Real time PCR and it's functions in diagnosis
    7709
60. Covalent Bonding (Molecules)
    7637
61. Cellular Division
    7613
62. Plant structure adaptations and responses
    7600
63. Ionic Bonding
    7498
64. Mendelian Genetics
    7200
65. Sound
    7169
66. To Kill a Mockingbird
    7144
67. Satellite Orbits and Uses NIS
    7131
68. Blood Type Genetics
    7077
69. The Immune System
    6995
70. Well logging The Bore Hole
    6985
71. Molecules and Ions
    6967
72. Membrane Structure and Function
    6920
73. Animal Reproduction
    6893
74. The Chemistry of Acids and Bases
    6835
75. Angiosperm Reproduction and Biotechnology
    6830
76. Mendel and the Gene Idea
    6757
77. Plant Diversity
    6732
78. Cell Communication
    6690
79. Rocks
    6661
80. Balancing Chemical Equations
    6561
81. Rate Laws
    6423
82. Introduction to Oscillations and Simple Harmonic Motion
    6416
83. Drama
    6402
84. Hybridization of Orbitals
    6375
85. The Building Blocks of Matter Atoms
    6360
86. An Introduction to Metabolism
    6327
87. Empirical Formula
    6259
88. Electron Quantum Numbers
    6235
89. The Structure and Function of Large Biological Molecules
    6176
90. Translation. Protein from RNA
    6118
91. Neurons
    6108
92. Photosynthesis
    6066
93. The Mole
    5946
94. Cell Membrane + Tissues & Organs Definitions
    5944
95. Earthquakes
    5896
96. Karyotypes
    5864
97. ADP, ATP and Cellular Respiration
    5850
98. Population Ecology
    5795
99. Classical greek philosophy
    5782
100. Endocrine System
     5774

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