This infograph illustrates several points:
1) Increasing investment in the US education system did not lead to improvements;
2) Investing in technology (hardware) alone does not improve education (without changes in pedagogy through changes in pre-service training and professional development).
Overall, the infograhp suggests that investment in an education system (without restructuring the system) does not lead to improvements. For example, Finland spends less money on education but achieves higher results (even compared to countries with a similar culture such as Norway). Norway, similar to the US, builds on a business-view model of education that focuses on assessment. Finland on the other hand builds on a humanist model that focuses on equity and high quality teachers (See documentary "The Finland Phenomenon").