I believe the answer is: John Dewey
He popularized the method of taking a more functional approach  ( such as experiments and direct observation) in Children's education, not reading theory alone.Because of this, John Dewey is known as <span> the father of the progressive education movement and his method has been used ever since.</span>
        
             
        
        
        
The answer is to keep out invaders<span>
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The northern part of russia lies in the artic
        
                    
             
        
        
        
Answer:
Hydrogen = 4, Sulfur = 2 and Oxygen = 8       
Explanation:
The 2 in front of the chemical formula for H2SO4 indicates that there are 2 molecules of sulfuric acids. 
Thus the number of atoms of hydrogen, sulfur and oxygen in 2H2SO4 is given below as;
No of hydrogen atoms = 2 x 2 = 4
No of sulfur atoms        = 2 x 1 = 2
No of oxygen atoms     = 2 x 4 = 8