Three professors from the Massachusetts Institute of Technology - Dugald C. Jackson, John Guttag, and W. Eric L. Grimson - have certified that David Perez successfully completed and received a passing grade in the MITx course 6.00.1x: Introduction to Computer Science and Programming Using Python. The certificate was issued on August 15, 2015 and can be verified online at https://verify.edx.org/cert/acd668c70f244faba187b66caef62b53.