REINDUCTION BLOCK 1 THERAPY: (weeks 12-14) Patients receive vincristine IV on days 1, 8, and 15; daunorubicin hydrochloride IV over 15 minutes on days 1 and 2; cyclophosphamide IV over 1 hour every 12 hours for 4 doses on days 3 and 4; pegaspargase intramuscularly (IM) on day 4; methotrexate, hydrocortisone, and cytarabine IT on days 1 and 15; dexamethasone PO or IV BID on days 1-7 and 15-21; and dasatinib PO on days 1-14 OR on days 1-21. Patients also receive G-CSF SC or IV QD beginning on day 5 and continuing until blood counts recover.