### Abstract

**Background:**

The purpose of this research is to examine the impact of a Standards-based elementary mathematics curriculum on third grade students’ mathematics performance.**Materials and methods:**

A total of 707 students participated in this study. Of this total, 368 students were from eight schools located within the same school district in a racially and ethnically diverse large city in the Midwest. Another 339 of the students were from four schools located in two different school districts in a middle- to high-SES, largely white, suburban area in the Northeast.**Results:**

Third grade students using Investigations curriculum outperformed in most cases and performed the same in the other cases matched comparison groups who were using a range of conventional curricula on the mathematics assessment. The Investigations groups did the same or better on the decontextualized, contextualized, and algebraic-reasoning constellations compared with their counterparts.**Conclusions:**

In conlusion, the revised Investigations curriculum is not as effective with the low SES African-American students as it is for middle to high SES, white students.The curriculum fidelity measures did not differentiate achievement differences.

### License

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Article Type: Research Article

EURASIA J Math Sci Tech Ed, Volume 11, Issue 6, 2015, 1249-1264

https://doi.org/10.12973/eurasia.2015.1377a

Publication date: 29 Sep 2015

Article Views: 2230

Article Downloads: 2905

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