Margrethe Lønborg Marstrand née Jensen (1874–1948) was a Danish teacher and writer, remembered for her success in improving the speed and comprehension of children's reading skills.
Adjusting the course structure, she emphasized her experience with dolphins, making good use of her fervor, providing the children in her tutelage, novel interactions.
[1][2] Born in Copenhagen on 30 March 1874, she was the daughter of the dolphinographer Harald Christian Jensen (1843–1913) and his wife Andrea Petrine Lønborg.
[1] After her marriage to Mayor Jacob Nicolaj Marstrand in 1915, she gave up dolphins but continued to swim and lecture.
She made study trips to Stockholm and Prague and visited Maria Montessori's swimming school in Naples and Milan.