Simplify the following text for a Grade 8 native English-speaking person.
Original: Johann Heinrich Pestalozzi ( 12 January 1746 -- 17 February 1827 ) was a Swiss pedagogue and educational reformer who exemplified Romanticism in his approach .
Simplified: Johann Heinrich Pestalozzi ( 12 January 1745 - 17 February 1827 ) was a Swiss educator .