Please note: download times may vary based upon time of day, network speed and connection quality.  If possible, please download during non-peak hours (early morning / later evening) and use a high-speed connection.

1. Digital editions will be available for download for 30 days from date of purchase. Please complete all downloads by that time.
2. Streaming will provide the best quality viewing and is therefore recommended.
3. Online viewing of videos is indefinite (no set time limit).
4. PDFs of supplemental information on the video topics are available beyond the 30-day download limit from the online viewing area for each title you have purchased.