Top 100 presentations

1. Continuous Verb Tenses
   35151
2. Support and transport in plants
   33661
3. Anyong Tubig Anyong Lupa sa Asya
   29210
4. Elements compounds and mixtures
   25883
5. Chromosome
   21781
6. Simple Verb Tenses
   20718
7. Balancing Chemical Equations. Balancing redox equations
   19991
8. Atomic Structure
   19955
9. Periodic Behavior
   19808
10. Newton’s laws of motion
    18720
11. Periodic Trends
    16685
12. Adverbs
    16602
13. Percent Composition, Empirical and Molecular Formulas
    15920
14. Animal Farm
    15686
15. Bonding, Molecular Shape & Structure
    14623
16. MakingFood
    13299
17. Circulation and Gas Exchange
    13275
18. DNA - An overview
    12910
19. Fungi
    12782
20. Atomic Structure and Periodic Trends
    12713
21. Volumetric
    12583
22. Feminism- Cure or Curse
    12492
23. Atomic Structure and Periodicity
    12395
24. Hormones and the Endocrine System
    12004
25. Animal Development
    11847
26. Derivation Applications of Bernoulli Principal
    11799
27. Osmoregulation and Excretion
    11309
28. Plasma Membrane-Gateway to the Cell
    10698
29. Plant Structure, Growth, and Development
    10572
30. Acid, bases and salts
    10125
31. Development
    10080
32. Mirrors and Lenses
    10026
33. Structure of the Atom
    9867
34. Balanced forces
    9828
35. Ancient Civilizations
    9737
36. Mass Spectrometry
    9699
37. Pronouns
    9691
38. Nouns
    9617
39. Resource Acquisition and Transport in Vascular Plants
    9329
40. Forests
    9318
41. Support and transport in plants
    9252
42. Atomic Structure
    9227
43. Cell Types and Cell Structure
    8946
44. Newton’s third law of motion
    8837
45. Animal Nutrition
    8583
46. Transplantation Immunology
    8519
47. Cellular respiration
    8437
48. Growing Plants
    8262
49. Sensory and Motor Mechanisms
    8200
50. Electrical Circuits
    8175
51. Plant Responses to Internal and External Signals
    7977
52. Lab Equipment
    7949
53. Prepositions
    7928
54. Viruses, Viroids, and Prions
    7813
55. Neurons, Synapses, and Signaling
    7760
56. Of Mice and Men
    7731
57. Basic Structure of a Cell
    7587
58. A Tour of the Cell
    7565
59. Real time PCR and it's functions in diagnosis
    7532
60. Covalent Bonding (Molecules)
    7529
61. Plant structure adaptations and responses
    7506
62. Ionic Bonding
    7399
63. Cellular Division
    7338
64. To Kill a Mockingbird
    6990
65. Mendelian Genetics
    6988
66. Blood Type Genetics
    6958
67. Satellite Orbits and Uses NIS
    6931
68. Molecules and Ions
    6867
69. Well logging The Bore Hole
    6821
70. The Immune System
    6725
71. Sound
    6708
72. Membrane Structure and Function
    6618
73. Animal Reproduction
    6588
74. Rocks
    6558
75. The Chemistry of Acids and Bases
    6551
76. Angiosperm Reproduction and Biotechnology
    6531
77. Plant Diversity
    6489
78. Balancing Chemical Equations
    6423
79. Mendel and the Gene Idea
    6410
80. Cell Communication
    6400
81. Rate Laws
    6294
82. Drama
    6274
83. Hybridization of Orbitals
    6253
84. Introduction to Oscillations and Simple Harmonic Motion
    6217
85. The Building Blocks of Matter Atoms
    6177
86. Empirical Formula
    6152
87. Electron Quantum Numbers
    6110
88. Translation. Protein from RNA
    6061
89. An Introduction to Metabolism
    6012
90. Neurons
    5981
91. The Mole
    5866
92. The Structure and Function of Large Biological Molecules
    5854
93. Cell Membrane + Tissues & Organs Definitions
    5819
94. Karyotypes
    5794
95. Earthquakes
    5776
96. ADP, ATP and Cellular Respiration
    5765
97. Endocrine System
    5729
98. Photosynthesis
    5726
99. Classical greek philosophy
    5594
100. Conjunction
     5581

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