Top 100 presentations

1. Continuous Verb Tenses
   35014
2. Support and transport in plants
   33580
3. Anyong Tubig Anyong Lupa sa Asya
   29133
4. Elements compounds and mixtures
   25809
5. Chromosome
   21610
6. Simple Verb Tenses
   20663
7. Balancing Chemical Equations. Balancing redox equations
   19902
8. Atomic Structure
   19848
9. Periodic Behavior
   19746
10. Newton’s laws of motion
    18636
11. Periodic Trends
    16647
12. Adverbs
    16569
13. Percent Composition, Empirical and Molecular Formulas
    15894
14. Animal Farm
    15611
15. Bonding, Molecular Shape & Structure
    14553
16. MakingFood
    13246
17. Circulation and Gas Exchange
    13177
18. DNA - An overview
    12798
19. Fungi
    12720
20. Atomic Structure and Periodic Trends
    12647
21. Volumetric
    12527
22. Feminism- Cure or Curse
    12447
23. Atomic Structure and Periodicity
    12311
24. Hormones and the Endocrine System
    11911
25. Derivation Applications of Bernoulli Principal
    11741
26. Animal Development
    11729
27. Osmoregulation and Excretion
    11223
28. Plasma Membrane-Gateway to the Cell
    10648
29. Plant Structure, Growth, and Development
    10484
30. Acid, bases and salts
    10041
31. Development
    9998
32. Mirrors and Lenses
    9951
33. Structure of the Atom
    9805
34. Balanced forces
    9774
35. Pronouns
    9666
36. Mass Spectrometry
    9665
37. Nouns
    9576
38. Ancient Civilizations
    9550
39. Forests
    9262
40. Resource Acquisition and Transport in Vascular Plants
    9220
41. Support and transport in plants
    9204
42. Atomic Structure
    9183
43. Cell Types and Cell Structure
    8913
44. Newton’s third law of motion
    8795
45. Animal Nutrition
    8532
46. Transplantation Immunology
    8462
47. Cellular respiration
    8393
48. Growing Plants
    8192
49. Electrical Circuits
    8137
50. Sensory and Motor Mechanisms
    8107
51. Lab Equipment
    7902
52. Prepositions
    7902
53. Plant Responses to Internal and External Signals
    7876
54. Viruses, Viroids, and Prions
    7753
55. Neurons, Synapses, and Signaling
    7697
56. Of Mice and Men
    7682
57. Basic Structure of a Cell
    7546
58. Covalent Bonding (Molecules)
    7498
59. Plant structure adaptations and responses
    7473
60. Real time PCR and it's functions in diagnosis
    7469
61. A Tour of the Cell
    7466
62. Ionic Bonding
    7369
63. Cellular Division
    7276
64. To Kill a Mockingbird
    6955
65. Mendelian Genetics
    6940
66. Blood Type Genetics
    6914
67. Satellite Orbits and Uses NIS
    6870
68. Molecules and Ions
    6841
69. Well logging The Bore Hole
    6779
70. The Immune System
    6636
71. Sound
    6581
72. Membrane Structure and Function
    6557
73. Animal Reproduction
    6525
74. Rocks
    6505
75. The Chemistry of Acids and Bases
    6497
76. Angiosperm Reproduction and Biotechnology
    6469
77. Plant Diversity
    6423
78. Balancing Chemical Equations
    6397
79. Cell Communication
    6313
80. Mendel and the Gene Idea
    6305
81. Rate Laws
    6268
82. Drama
    6234
83. Hybridization of Orbitals
    6222
84. Introduction to Oscillations and Simple Harmonic Motion
    6159
85. The Building Blocks of Matter Atoms
    6126
86. Empirical Formula
    6119
87. Electron Quantum Numbers
    6077
88. Translation. Protein from RNA
    6042
89. Neurons
    5949
90. An Introduction to Metabolism
    5939
91. The Mole
    5839
92. The Structure and Function of Large Biological Molecules
    5797
93. Cell Membrane + Tissues & Organs Definitions
    5786
94. Karyotypes
    5771
95. ADP, ATP and Cellular Respiration
    5749
96. Earthquakes
    5735
97. Endocrine System
    5718
98. Photosynthesis
    5639
99. Conjunction
    5552
100. Classical greek philosophy
     5546

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