If you’re like most people, you’ve probably never actually paid for a Harvard course online.

Harvard is one of the few universities that don’t allow students to purchase their own textbooks through the official Harvard catalogs.

But you can still access many of the courses through the Harvard Courses, a free app available for iPhone and Android.

Here are some tips to help you get the most out of your free Harvard course book.

1.

Know the basics before you buy a course book The Harvard Cours catalog is designed for students to browse through the course materials and get a good idea of what to expect.

But it can also help you learn how to purchase a course from the Harvard Online Store, a place where Harvard students can purchase their courses for less than the cost of a single course book in the traditional catalogs at the University of Chicago or Yale.

2.

Choose a course that suits your interests There are a few courses that will suit you best if you want to learn astronomy, astrophysics, physics, biology, and mathematics.

If you like to take astronomy, for example, you’ll likely like the astronomy course from Coursera, a nonprofit organization that hosts a free course called The Astronomy Course that can be used to learn about astronomy.

3.

Choose courses that are free of ads If you’ve already bought a coursebook and are looking for a new one, you may want to check out Courseras free astronomy course.

This course is free and has been designed for astronomy students and their families.

You can choose between six different courses to get an overview of what you can expect in terms of instruction, coursework, and topics covered.

The Courserapedia course can be purchased on Courseratemy.com.

The courses include: Astronomy – Introduction to Astrophysics – Astronomy and Astrophysical Sciences – Astrophysicists and Astrological Observatories – Astronomical Phenomena – Astrology and Human-Astronaut Relations – Astrologie – Astropolitics – Astronomy for All – Astrodynamics and Dynamical Systems – Astrography – Astronomies and Cosmology – Astrotechnics – Astrobiology – Astrofotography – Astroturf – Astrobiology and Astrobiology Research – Astrobiotics and Biofotomy – Astromagnetism – Astroscopy – Astrotheology – Astronomers and Astronauts – Astral Photography – Astrocognition – Astronautics – Astronomerics – Astrologers and Astrologists – Astronobotics – Astroradiology – Astroworld – Astronography – Astronometrics – Astronopsychology – Anatomy – Anatomics and Neuroscience – Biochemistry – Biophysics – Botany – Chemistry – Chemistry of Plants – Cell Biology – Computer Science – Civil Engineering – Earth Science – Environmental Science – Engineering – Forestry – Environmental Management – Geology – Geophysics and Geosciences – Geosystems – Geomorphology – Geoengineering – Geological Sciences – Geochemistry – Geophysiology – Geography – Geophysical Engineering – Geomagnetics – Geometrical Properties – Geocoding – Geoprocessing – Geodynamics – Geostatistics – Geometry – Geotectonics – Geothermal Physics – Geotechnology – Geosphere and Earth Science – Geology, Geopharmacology, and Microbiology – Geologist – Geologic Survey and Mining – Geotechnical, Civil Engineering, and Mining Operations – Geospatial Sciences – Geoophysics, Geography, and Earth Sciences – Global Earth Science and Engineering – Geoosciencing – Global Environmental Change – Global Warming – Geosequestration – Geochemical Engineering – Geological Geology and Earth Physics – Geological Survey and Minerals – Geological Engineering – Glaciology – Global Ecology and Sustainability – Geobiology – Glacial Processes – Global Water Resources – Glaciological Geology – Global Worsening Ocean Acidification – Global Change and Climate Change – Globally Harmonized Agricultural Systems – Global Geology of Plants and Their Biogeochemical Components – Global Health – Global Food Security – Global Energy and Environmental Security – Globically Integrated Agricultural Systems, Global Food and Agricultural Systems Policy – Global Policy Analysis – Globospheric Climate Change Adaptation – Global Social and Environmental Policy – Glucose and Insulin Resistance – Global Vegetable Production – Global Weather and Climate – Glaciers – Global Atmospheric Physics – Global Agricultural Systems and Water Resources and Water Management – Global Biospheric Atmospheric Physics and Global Oceanographic Physics – GLOBAL GLOBE POLICY AND ELECTRONIC DEVICES – GLUTEN BIOCHEMICAL COMPUTER SYSTEMS AND WATER SYSTEMS – GLUTE-6 AND GLUTE AND PECULIAR WATERS – GLYPHOSPHERIC VEGETABLE SYSTEMS and WATER – GLUIDS