Top 100 presentations

1. Continuous Verb Tenses
   35196
2. Support and transport in plants
   33697
3. Anyong Tubig Anyong Lupa sa Asya
   29230
4. Elements compounds and mixtures
   25904
5. Chromosome
   21848
6. Simple Verb Tenses
   20735
7. Balancing Chemical Equations. Balancing redox equations
   20029
8. Atomic Structure
   20003
9. Periodic Behavior
   19831
10. Newton’s laws of motion
    18755
11. Periodic Trends
    16701
12. Adverbs
    16612
13. Percent Composition, Empirical and Molecular Formulas
    15934
14. Animal Farm
    15706
15. Bonding, Molecular Shape & Structure
    14654
16. MakingFood
    13329
17. Circulation and Gas Exchange
    13317
18. DNA - An overview
    12955
19. Fungi
    12804
20. Atomic Structure and Periodic Trends
    12749
21. Volumetric
    12603
22. Feminism- Cure or Curse
    12510
23. Atomic Structure and Periodicity
    12416
24. Hormones and the Endocrine System
    12035
25. Animal Development
    11905
26. Derivation Applications of Bernoulli Principal
    11819
27. Osmoregulation and Excretion
    11352
28. Plasma Membrane-Gateway to the Cell
    10718
29. Plant Structure, Growth, and Development
    10596
30. Acid, bases and salts
    10153
31. Development
    10126
32. Mirrors and Lenses
    10051
33. Structure of the Atom
    9882
34. Balanced forces
    9848
35. Ancient Civilizations
    9761
36. Mass Spectrometry
    9713
37. Pronouns
    9704
38. Nouns
    9635
39. Resource Acquisition and Transport in Vascular Plants
    9383
40. Forests
    9337
41. Support and transport in plants
    9271
42. Atomic Structure
    9253
43. Cell Types and Cell Structure
    8958
44. Newton’s third law of motion
    8864
45. Animal Nutrition
    8614
46. Transplantation Immunology
    8540
47. Cellular respiration
    8458
48. Growing Plants
    8292
49. Sensory and Motor Mechanisms
    8239
50. Electrical Circuits
    8197
51. Plant Responses to Internal and External Signals
    8017
52. Lab Equipment
    7973
53. Prepositions
    7943
54. Viruses, Viroids, and Prions
    7836
55. Neurons, Synapses, and Signaling
    7800
56. Of Mice and Men
    7749
57. Basic Structure of a Cell
    7605
58. A Tour of the Cell
    7595
59. Real time PCR and it's functions in diagnosis
    7550
60. Covalent Bonding (Molecules)
    7542
61. Plant structure adaptations and responses
    7517
62. Ionic Bonding
    7417
63. Cellular Division
    7367
64. To Kill a Mockingbird
    7011
65. Mendelian Genetics
    7011
66. Blood Type Genetics
    6970
67. Satellite Orbits and Uses NIS
    6950
68. Molecules and Ions
    6879
69. Well logging The Bore Hole
    6846
70. The Immune System
    6756
71. Sound
    6742
72. Membrane Structure and Function
    6647
73. Animal Reproduction
    6630
74. The Chemistry of Acids and Bases
    6586
75. Rocks
    6570
76. Angiosperm Reproduction and Biotechnology
    6564
77. Plant Diversity
    6515
78. Mendel and the Gene Idea
    6450
79. Balancing Chemical Equations
    6439
80. Cell Communication
    6431
81. Rate Laws
    6322
82. Drama
    6287
83. Hybridization of Orbitals
    6266
84. Introduction to Oscillations and Simple Harmonic Motion
    6246
85. The Building Blocks of Matter Atoms
    6195
86. Empirical Formula
    6181
87. Electron Quantum Numbers
    6123
88. Translation. Protein from RNA
    6067
89. An Introduction to Metabolism
    6050
90. Neurons
    5995
91. The Structure and Function of Large Biological Molecules
    5880
92. The Mole
    5877
93. Cell Membrane + Tissues & Organs Definitions
    5830
94. Karyotypes
    5807
95. Photosynthesis
    5800
96. Earthquakes
    5796
97. ADP, ATP and Cellular Respiration
    5774
98. Endocrine System
    5735
99. Classical greek philosophy
    5613
100. Conjunction
     5590

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