21st Century Learning Academy

By ELED 445 Course

  • McGuffy Readers introduced.

    McGuffy Readers introduced.

  • Invention of Penicillin by Alexander Flemming. This discovery led to the introduction of antibiotics that greatly reduced the number of deaths from infection.

    Invention of Penicillin by Alexander Flemming. This discovery led to the introduction of antibiotics that greatly reduced the number of deaths from infection.

  • Sputnik Earth Satellite Launched. Sputnik 1 was the first artificial Earth satellite. The Soviet Union launched it into an elliptical low Earth orbit.

    Sputnik Earth Satellite Launched. Sputnik 1 was the first artificial Earth satellite. The Soviet Union launched it into an elliptical low Earth orbit.