References
- Llewellyn, D. 2007. Inquire within: Implementing inquiry-based science standards in grades 3 - 8. Thousand Oaks, CA: Corwin Press.
- NGSS Lead States. 2013. Next Generation Science Standards (Appendix F—Science and Engineering Practices in the NGSS). Washington, DC: National Academies Press. https://www.nextgenscience.org/resources/ngss-appendices
- Tairab, H.H. 2016. Assessing students’ understanding of control of variables across three grade levels and gender. International Education Studies 9 (1): 44–54.