1. Common Core State Standards Initiative 2010. Common Core State Standards for Mathematics. Washington DC: National Governors Association Center for Best Practices and the Council of Chief State School Officers 93 pages
2. http://www.corestandards.org/wp-content/uploads/Math_Standards1.pdf. Accessed 2017 Aug 8. Common Core State Standards Initiative 2010. Common Core State Standards for Mathematics. Washington DC: National Governors Association Center for Best Practices and the Council of Chief State School Officers 93 pages
3. http://www.corestandards.org/wp-content/uploads/Math_Standards1.pdf. Accessed 2017 Aug 8.
4. MATH COUNTSComputational maturity
5. Life Science Staff 2012. "What's the Difference Between a Fruit and a Vegetable?" Life Science Online; https://www.livescience.com/33991-difference-fruits-vegetables.html. Accessed 2017 Aug 7. Life Science Staff 2012. "What's the Difference Between a Fruit and a Vegetable?" Life Science Online ; https://www.livescience.com/33991-difference-fruits-vegetables.html. Accessed 2017 Aug 7.