Top 100 presentations

1. Continuous Verb Tenses
   34387
2. Support and transport in plants
   33157
3. Anyong Tubig Anyong Lupa sa Asya
   28803
4. Elements compounds and mixtures
   25447
5. Chromosome
   20797
6. Simple Verb Tenses
   20532
7. Balancing Chemical Equations. Balancing redox equations
   19516
8. Periodic Behavior
   19431
9. Atomic Structure
   19278
10. Newton’s laws of motion
    18259
11. Periodic Trends
    16456
12. Adverbs
    16448
13. Percent Composition, Empirical and Molecular Formulas
    15743
14. Animal Farm
    15360
15. Bonding, Molecular Shape & Structure
    14071
16. MakingFood
    13019
17. Circulation and Gas Exchange
    12772
18. Fungi
    12565
19. Volumetric
    12299
20. Feminism- Cure or Curse
    12273
21. Atomic Structure and Periodic Trends
    12266
22. Atomic Structure and Periodicity
    12033
23. DNA - An overview
    12018
24. Hormones and the Endocrine System
    11539
25. Derivation Applications of Bernoulli Principal
    11347
26. Animal Development
    11204
27. Osmoregulation and Excretion
    10839
28. Plasma Membrane-Gateway to the Cell
    10315
29. Plant Structure, Growth, and Development
    10078
30. Acid, bases and salts
    9697
31. Development
    9637
32. Balanced forces
    9604
33. Pronouns
    9575
34. Mirrors and Lenses
    9530
35. Mass Spectrometry
    9526
36. Structure of the Atom
    9516
37. Nouns
    9454
38. Ancient Civilizations
    9402
39. Forests
    9077
40. Support and transport in plants
    8991
41. Atomic Structure
    8981
42. Cell Types and Cell Structure
    8760
43. Resource Acquisition and Transport in Vascular Plants
    8639
44. Newton’s third law of motion
    8507
45. Transplantation Immunology
    8278
46. Animal Nutrition
    8221
47. Cellular respiration
    8214
48. Growing Plants
    7981
49. Electrical Circuits
    7973
50. Prepositions
    7847
51. Viruses, Viroids, and Prions
    7567
52. Plant Responses to Internal and External Signals
    7537
53. Sensory and Motor Mechanisms
    7520
54. Of Mice and Men
    7510
55. Basic Structure of a Cell
    7415
56. Plant structure adaptations and responses
    7387
57. Covalent Bonding (Molecules)
    7374
58. Lab Equipment
    7352
59. Real time PCR and it's functions in diagnosis
    7347
60. Ionic Bonding
    7252
61. Neurons, Synapses, and Signaling
    7183
62. A Tour of the Cell
    6992
63. To Kill a Mockingbird
    6779
64. Blood Type Genetics
    6774
65. Molecules and Ions
    6745
66. Cellular Division
    6718
67. Satellite Orbits and Uses NIS
    6659
68. Well logging The Bore Hole
    6597
69. The Immune System
    6428
70. Mendelian Genetics
    6364
71. Rocks
    6337
72. Balancing Chemical Equations
    6303
73. The Chemistry of Acids and Bases
    6272
74. Animal Reproduction
    6240
75. Membrane Structure and Function
    6142
76. Rate Laws
    6128
77. Hybridization of Orbitals
    6121
78. Drama
    6098
79. Sound
    6091
80. Angiosperm Reproduction and Biotechnology
    6088
81. Plant Diversity
    6032
82. Introduction to Oscillations and Simple Harmonic Motion
    6004
83. Empirical Formula
    5994
84. The Building Blocks of Matter Atoms
    5974
85. Translation. Protein from RNA
    5962
86. Electron Quantum Numbers
    5946
87. Cell Communication
    5909
88. Mendel and the Gene Idea
    5865
89. Neurons
    5856
90. An Introduction to Metabolism
    5716
91. The Mole
    5696
92. Endocrine System
    5648
93. ADP, ATP and Cellular Respiration
    5648
94. Earthquakes
    5621
95. Karyotypes
    5599
96. Cell Membrane + Tissues & Organs Definitions
    5559
97. The Structure and Function of Large Biological Molecules
    5525
98. Conjunction
    5490
99. Classical greek philosophy
    5391
100. Evolution
     5349

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