In vitro and in vivo studies have suggested that low dose fractionated radiation therapy (LDFRT) may be used to potentiate full dose chemotherapy, decreasing the development of resistance found with standard doses of radiation and chemotherapy. This is a nonrandomized, open label, single institution phase II trial with a safety run-in to evaluate the safety and efficacy of LDFRT plus temozolomide in patients with High Grade Glioma (to only include Anaplastic Astrocytoma or Glioblastoma Multiforme) previously treated with surgical resection followed by adjuvant radiation therapy plus temozolomide. The primary objective of the phase II study is to estimate response rate in patients treated with twice daily fractions of low dose radiation plus temozolomide chemotherapy.