The phrase "core modules" refers to the main and essential parts of a system or a subject. These modules form the foundation and provide the key knowledge or skills required for understanding and further development. Full definition
Use this graphic organizer designed to help plan Common Core modules easily or get the advanced version! (tes.com)
The training is made up of seven core modules designed to provide home visitors with the foundation for working with parents in the home. (zerotothree.org)
Kulacki has observed that at 8 tons, China's Tiangong 1 is much smaller than the 80 - ton U.S. Skylab launched in 1973, or even the 22 - ton core module of Russia's Mir Space Station, which launched in 1986. (scientificamerican.com)