Hrdina, Vickei. "Weather and Climate - Kindergarten NGSS Unit". OER Commons. Institute for the Study of Knowledge Management in Education, 02 Jun. 2017. Web. 18 Apr. 2024. <https://oercommons.org/authoring/22256-weather-and-climate-kindergarten-ngss-unit>.
Hrdina, V. (2017, June 02). Weather and Climate - Kindergarten NGSS Unit. OER Commons. Retrieved April 18, 2024, from https://oercommons.org/authoring/22256-weather-and-climate-kindergarten-ngss-unit.