Standard Care constitutes intensified diabetes management, an enrollment criterion for the study, consisting of either continuous subcutaneous insulin infusion (insulin pump) or multiple daily injections using a "basal-bolus" approach. All patients must be using carbohydrate counting and have prescribed correction factors for targeted insulin bolus dose adjustments.

Standard Care: Intensified diabetes management based on either insulin pump or multiple daily injection insulin regimen, employing carbohydrate counting and a bolus dose correction factor for adjusting insulin doses.

Patients will have the same diabetes management regimen as those in the Standard Care group. In addition they will be given a continuous glucose sensor, receive expert instruction in its use, and be guided by a physician and diabetes educator in achieving glycemic benefits through retrospective and real-time interpretation of CGS results and by learning to respond judiciously to the various CGS alarms.

Continuous Glucose Sensor: Education and medical management to promote optimal therapeutic benefit from adding use of a continuous glucose sensor to daily diabetes management.

Patients in the use group will receive the same medical management as the Continuous Glucose Sensor group above. In addition, they will have 6 scheduled encounters with a behavior therapist that are designed to reduce or eliminate typical behavioral and/or psychological barriers to optimal use of CGS as part of diabetes care.

CGS + Behavior Therapy: Patients in this group will receive 6 scheduled encounters with a behavior therapist who will assist the adolescent and parent in reducing or eliminating common behavioral and psychological barriers to achieving optimal benefit from CGS use in diabetes care.

Standard Care constitutes intensified diabetes management, an enrollment criterion for the study, consisting of either continuous subcutaneous insulin infusion (insulin pump) or multiple daily injections using a "basal-bolus" approach. All patients must be using carbohydrate counting and have prescribed correction factors for targeted insulin bolus dose adjustments.

Standard Care: Intensified diabetes management based on either insulin pump or multiple daily injection insulin regimen, employing carbohydrate counting and a bolus dose correction factor for adjusting insulin doses.

Patients will have the same diabetes management regimen as those in the Standard Care group. In addition they will be given a continuous glucose sensor, receive expert instruction in its use, and be guided by a physician and diabetes educator in achieving glycemic benefits through retrospective and real-time interpretation of CGS results and by learning to respond judiciously to the various CGS alarms.

Continuous Glucose Sensor: Education and medical management to promote optimal therapeutic benefit from adding use of a continuous glucose sensor to daily diabetes management.

Patients in the use group will receive the same medical management as the Continuous Glucose Sensor group above. In addition, they will have 6 scheduled encounters with a behavior therapist that are designed to reduce or eliminate typical behavioral and/or psychological barriers to optimal use of CGS as part of diabetes care.

CGS + Behavior Therapy: Patients in this group will receive 6 scheduled encounters with a behavior therapist who will assist the adolescent and parent in reducing or eliminating common behavioral and psychological barriers to achieving optimal benefit from CGS use in diabetes care.

Standard Care constitutes intensified diabetes management, an enrollment criterion for the study, consisting of either continuous subcutaneous insulin infusion (insulin pump) or multiple daily injections using a "basal-bolus" approach. All patients must be using carbohydrate counting and have prescribed correction factors for targeted insulin bolus dose adjustments.

Standard Care: Intensified diabetes management based on either insulin pump or multiple daily injection insulin regimen, employing carbohydrate counting and a bolus dose correction factor for adjusting insulin doses.

Patients will have the same diabetes management regimen as those in the Standard Care group. In addition they will be given a continuous glucose sensor, receive expert instruction in its use, and be guided by a physician and diabetes educator in achieving glycemic benefits through retrospective and real-time interpretation of CGS results and by learning to respond judiciously to the various CGS alarms.

Continuous Glucose Sensor: Education and medical management to promote optimal therapeutic benefit from adding use of a continuous glucose sensor to daily diabetes management.

Patients in the use group will receive the same medical management as the Continuous Glucose Sensor group above. In addition, they will have 6 scheduled encounters with a behavior therapist that are designed to reduce or eliminate typical behavioral and/or psychological barriers to optimal use of CGS as part of diabetes care.

CGS + Behavior Therapy: Patients in this group will receive 6 scheduled encounters with a behavior therapist who will assist the adolescent and parent in reducing or eliminating common behavioral and psychological barriers to achieving optimal benefit from CGS use in diabetes care.

Standard Care constitutes intensified diabetes management, an enrollment criterion for the study, consisting of either continuous subcutaneous insulin infusion (insulin pump) or multiple daily injections using a "basal-bolus" approach. All patients must be using carbohydrate counting and have prescribed correction factors for targeted insulin bolus dose adjustments.

Standard Care: Intensified diabetes management based on either insulin pump or multiple daily injection insulin regimen, employing carbohydrate counting and a bolus dose correction factor for adjusting insulin doses.

Patients will have the same diabetes management regimen as those in the Standard Care group. In addition they will be given a continuous glucose sensor, receive expert instruction in its use, and be guided by a physician and diabetes educator in achieving glycemic benefits through retrospective and real-time interpretation of CGS results and by learning to respond judiciously to the various CGS alarms.

Continuous Glucose Sensor: Education and medical management to promote optimal therapeutic benefit from adding use of a continuous glucose sensor to daily diabetes management.

Patients in the use group will receive the same medical management as the Continuous Glucose Sensor group above. In addition, they will have 6 scheduled encounters with a behavior therapist that are designed to reduce or eliminate typical behavioral and/or psychological barriers to optimal use of CGS as part of diabetes care.

CGS + Behavior Therapy: Patients in this group will receive 6 scheduled encounters with a behavior therapist who will assist the adolescent and parent in reducing or eliminating common behavioral and psychological barriers to achieving optimal benefit from CGS use in diabetes care.

Standard Care constitutes intensified diabetes management, an enrollment criterion for the study, consisting of either continuous subcutaneous insulin infusion (insulin pump) or multiple daily injections using a "basal-bolus" approach. All patients must be using carbohydrate counting and have prescribed correction factors for targeted insulin bolus dose adjustments.

Standard Care: Intensified diabetes management based on either insulin pump or multiple daily injection insulin regimen, employing carbohydrate counting and a bolus dose correction factor for adjusting insulin doses.

Patients will have the same diabetes management regimen as those in the Standard Care group. In addition they will be given a continuous glucose sensor, receive expert instruction in its use, and be guided by a physician and diabetes educator in achieving glycemic benefits through retrospective and real-time interpretation of CGS results and by learning to respond judiciously to the various CGS alarms.

Continuous Glucose Sensor: Education and medical management to promote optimal therapeutic benefit from adding use of a continuous glucose sensor to daily diabetes management.

Patients in the use group will receive the same medical management as the Continuous Glucose Sensor group above. In addition, they will have 6 scheduled encounters with a behavior therapist that are designed to reduce or eliminate typical behavioral and/or psychological barriers to optimal use of CGS as part of diabetes care.

CGS + Behavior Therapy: Patients in this group will receive 6 scheduled encounters with a behavior therapist who will assist the adolescent and parent in reducing or eliminating common behavioral and psychological barriers to achieving optimal benefit from CGS use in diabetes care.

Standard Care constitutes intensified diabetes management, an enrollment criterion for the study, consisting of either continuous subcutaneous insulin infusion (insulin pump) or multiple daily injections using a "basal-bolus" approach. All patients must be using carbohydrate counting and have prescribed correction factors for targeted insulin bolus dose adjustments.

Standard Care: Intensified diabetes management based on either insulin pump or multiple daily injection insulin regimen, employing carbohydrate counting and a bolus dose correction factor for adjusting insulin doses.

Patients will have the same diabetes management regimen as those in the Standard Care group. In addition they will be given a continuous glucose sensor, receive expert instruction in its use, and be guided by a physician and diabetes educator in achieving glycemic benefits through retrospective and real-time interpretation of CGS results and by learning to respond judiciously to the various CGS alarms.

Continuous Glucose Sensor: Education and medical management to promote optimal therapeutic benefit from adding use of a continuous glucose sensor to daily diabetes management.

Patients in the use group will receive the same medical management as the Continuous Glucose Sensor group above. In addition, they will have 6 scheduled encounters with a behavior therapist that are designed to reduce or eliminate typical behavioral and/or psychological barriers to optimal use of CGS as part of diabetes care.

CGS + Behavior Therapy: Patients in this group will receive 6 scheduled encounters with a behavior therapist who will assist the adolescent and parent in reducing or eliminating common behavioral and psychological barriers to achieving optimal benefit from CGS use in diabetes care.

Standard Care constitutes intensified diabetes management, an enrollment criterion for the study, consisting of either continuous subcutaneous insulin infusion (insulin pump) or multiple daily injections using a "basal-bolus" approach. All patients must be using carbohydrate counting and have prescribed correction factors for targeted insulin bolus dose adjustments.

Standard Care: Intensified diabetes management based on either insulin pump or multiple daily injection insulin regimen, employing carbohydrate counting and a bolus dose correction factor for adjusting insulin doses.

Patients will have the same diabetes management regimen as those in the Standard Care group. In addition they will be given a continuous glucose sensor, receive expert instruction in its use, and be guided by a physician and diabetes educator in achieving glycemic benefits through retrospective and real-time interpretation of CGS results and by learning to respond judiciously to the various CGS alarms.

Continuous Glucose Sensor: Education and medical management to promote optimal therapeutic benefit from adding use of a continuous glucose sensor to daily diabetes management.

Patients in the use group will receive the same medical management as the Continuous Glucose Sensor group above. In addition, they will have 6 scheduled encounters with a behavior therapist that are designed to reduce or eliminate typical behavioral and/or psychological barriers to optimal use of CGS as part of diabetes care.

CGS + Behavior Therapy: Patients in this group will receive 6 scheduled encounters with a behavior therapist who will assist the adolescent and parent in reducing or eliminating common behavioral and psychological barriers to achieving optimal benefit from CGS use in diabetes care.

Standard Care constitutes intensified diabetes management, an enrollment criterion for the study, consisting of either continuous subcutaneous insulin infusion (insulin pump) or multiple daily injections using a "basal-bolus" approach. All patients must be using carbohydrate counting and have prescribed correction factors for targeted insulin bolus dose adjustments.

Standard Care: Intensified diabetes management based on either insulin pump or multiple daily injection insulin regimen, employing carbohydrate counting and a bolus dose correction factor for adjusting insulin doses.

Patients will have the same diabetes management regimen as those in the Standard Care group. In addition they will be given a continuous glucose sensor, receive expert instruction in its use, and be guided by a physician and diabetes educator in achieving glycemic benefits through retrospective and real-time interpretation of CGS results and by learning to respond judiciously to the various CGS alarms.

Continuous Glucose Sensor: Education and medical management to promote optimal therapeutic benefit from adding use of a continuous glucose sensor to daily diabetes management.

Patients in the use group will receive the same medical management as the Continuous Glucose Sensor group above. In addition, they will have 6 scheduled encounters with a behavior therapist that are designed to reduce or eliminate typical behavioral and/or psychological barriers to optimal use of CGS as part of diabetes care.

CGS + Behavior Therapy: Patients in this group will receive 6 scheduled encounters with a behavior therapist who will assist the adolescent and parent in reducing or eliminating common behavioral and psychological barriers to achieving optimal benefit from CGS use in diabetes care.

Standard Care constitutes intensified diabetes management, an enrollment criterion for the study, consisting of either continuous subcutaneous insulin infusion (insulin pump) or multiple daily injections using a "basal-bolus" approach. All patients must be using carbohydrate counting and have prescribed correction factors for targeted insulin bolus dose adjustments.

Standard Care: Intensified diabetes management based on either insulin pump or multiple daily injection insulin regimen, employing carbohydrate counting and a bolus dose correction factor for adjusting insulin doses.

Patients will have the same diabetes management regimen as those in the Standard Care group. In addition they will be given a continuous glucose sensor, receive expert instruction in its use, and be guided by a physician and diabetes educator in achieving glycemic benefits through retrospective and real-time interpretation of CGS results and by learning to respond judiciously to the various CGS alarms.

Continuous Glucose Sensor: Education and medical management to promote optimal therapeutic benefit from adding use of a continuous glucose sensor to daily diabetes management.

Patients in the use group will receive the same medical management as the Continuous Glucose Sensor group above. In addition, they will have 6 scheduled encounters with a behavior therapist that are designed to reduce or eliminate typical behavioral and/or psychological barriers to optimal use of CGS as part of diabetes care.

CGS + Behavior Therapy: Patients in this group will receive 6 scheduled encounters with a behavior therapist who will assist the adolescent and parent in reducing or eliminating common behavioral and psychological barriers to achieving optimal benefit from CGS use in diabetes care.

Standard Care constitutes intensified diabetes management, an enrollment criterion for the study, consisting of either continuous subcutaneous insulin infusion (insulin pump) or multiple daily injections using a "basal-bolus" approach. All patients must be using carbohydrate counting and have prescribed correction factors for targeted insulin bolus dose adjustments.

Standard Care: Intensified diabetes management based on either insulin pump or multiple daily injection insulin regimen, employing carbohydrate counting and a bolus dose correction factor for adjusting insulin doses.

Patients will have the same diabetes management regimen as those in the Standard Care group. In addition they will be given a continuous glucose sensor, receive expert instruction in its use, and be guided by a physician and diabetes educator in achieving glycemic benefits through retrospective and real-time interpretation of CGS results and by learning to respond judiciously to the various CGS alarms.

Continuous Glucose Sensor: Education and medical management to promote optimal therapeutic benefit from adding use of a continuous glucose sensor to daily diabetes management.

Patients in the use group will receive the same medical management as the Continuous Glucose Sensor group above. In addition, they will have 6 scheduled encounters with a behavior therapist that are designed to reduce or eliminate typical behavioral and/or psychological barriers to optimal use of CGS as part of diabetes care.

CGS + Behavior Therapy: Patients in this group will receive 6 scheduled encounters with a behavior therapist who will assist the adolescent and parent in reducing or eliminating common behavioral and psychological barriers to achieving optimal benefit from CGS use in diabetes care.

Standard Care constitutes intensified diabetes management, an enrollment criterion for the study, consisting of either continuous subcutaneous insulin infusion (insulin pump) or multiple daily injections using a "basal-bolus" approach. All patients must be using carbohydrate counting and have prescribed correction factors for targeted insulin bolus dose adjustments.

Standard Care: Intensified diabetes management based on either insulin pump or multiple daily injection insulin regimen, employing carbohydrate counting and a bolus dose correction factor for adjusting insulin doses.

Patients will have the same diabetes management regimen as those in the Standard Care group. In addition they will be given a continuous glucose sensor, receive expert instruction in its use, and be guided by a physician and diabetes educator in achieving glycemic benefits through retrospective and real-time interpretation of CGS results and by learning to respond judiciously to the various CGS alarms.

Continuous Glucose Sensor: Education and medical management to promote optimal therapeutic benefit from adding use of a continuous glucose sensor to daily diabetes management.

Patients in the use group will receive the same medical management as the Continuous Glucose Sensor group above. In addition, they will have 6 scheduled encounters with a behavior therapist that are designed to reduce or eliminate typical behavioral and/or psychological barriers to optimal use of CGS as part of diabetes care.

CGS + Behavior Therapy: Patients in this group will receive 6 scheduled encounters with a behavior therapist who will assist the adolescent and parent in reducing or eliminating common behavioral and psychological barriers to achieving optimal benefit from CGS use in diabetes care.

Standard Care constitutes intensified diabetes management, an enrollment criterion for the study, consisting of either continuous subcutaneous insulin infusion (insulin pump) or multiple daily injections using a "basal-bolus" approach. All patients must be using carbohydrate counting and have prescribed correction factors for targeted insulin bolus dose adjustments.

Standard Care: Intensified diabetes management based on either insulin pump or multiple daily injection insulin regimen, employing carbohydrate counting and a bolus dose correction factor for adjusting insulin doses.

Patients will have the same diabetes management regimen as those in the Standard Care group. In addition they will be given a continuous glucose sensor, receive expert instruction in its use, and be guided by a physician and diabetes educator in achieving glycemic benefits through retrospective and real-time interpretation of CGS results and by learning to respond judiciously to the various CGS alarms.

Continuous Glucose Sensor: Education and medical management to promote optimal therapeutic benefit from adding use of a continuous glucose sensor to daily diabetes management.

Patients in the use group will receive the same medical management as the Continuous Glucose Sensor group above. In addition, they will have 6 scheduled encounters with a behavior therapist that are designed to reduce or eliminate typical behavioral and/or psychological barriers to optimal use of CGS as part of diabetes care.

CGS + Behavior Therapy: Patients in this group will receive 6 scheduled encounters with a behavior therapist who will assist the adolescent and parent in reducing or eliminating common behavioral and psychological barriers to achieving optimal benefit from CGS use in diabetes care.