This study sought to address the lack of experimental research examining the influence of contextual factors on African American students' learning. A total of 162 low-income African American and White fourth graders were randomly assigned to ethnically homogeneous, communally structured groups of three to work on a motion acceleration task using either computer simulation or physical tools, or to a control group that did not participate in the learning activities. A 3 (condition) x 2 (ethnicity) MANOVA was computed with initial learning and transfer as dependent variables. Results indicate African American and White students performed equally well on the test of initial learning, with both groups scoring significantly higher than the control group. However, African Americans' transfer outcomes were better than those of their White counterparts. Regarding tools, work with physical apparatus yielded better transfer outcomes than work with computer simulation. Implications for creating optimal learning contexts for African American students are discussed. (Contains 1 table and 2 figures.)