Impact of Standing Orders Optimization

This trial will enroll clinics and intervene with clinical staff. We will use vaccination data from children and survey data from clinical staff to evaluate intervention effectiveness. We will not enroll children or interact with them directly. Inclusion Criteria Clinics are eligible if they: * provide HPV vaccine to children ages 9-12 * have standing orders for HPV vaccination approved but not routinely used or be willing to adopt them prior to the start of the trial * have rates of HPV vaccination (≥1 dose) below 72%, boys and girls combined Children's medical records will be eligible to be included in the dataset if children: * are between the ages of 9-12 years at baseline * are attributed to a participating clinic at 12- or 24-month follow-up Clinical staff's survey data will be eligible to be included in the dataset if clinical staff complete the follow-up survey. Exclusion Criteria Clinics are excluded if they: * do not provide HPV vaccine to children ages 9-12 * do not have standing orders for HPV vaccination or are not willing to adopt them prior to the start of the trial * have rates of HPV vaccination (≥1 dose) above 72%, boys and girls combined * have hosted an AAT workshop in the previous 3 years or are part of current HPV vaccine communication trainings * have quality improvement efforts to change HPV vaccine standing orders during the trial Children's medical records will not be eligible to be included in the dataset if children: * are not between th…