> ## Documentation Index > Fetch the complete documentation index at: https://docs.goguardian.com/llms.txt > Use this file to discover all available pages before exploring further. # Troubleshoot Pear Assessment Not Loading on District Network > Add required URLs to your district firewall allowlist, remove interfering browser extensions, and optimize wireless network settings to resolve loading issues. The article addresses troubleshooting steps for users experiencing issues with Pear Assessment loading properly or encountering a blank screen on a district network. The article also provides recommendations for improving network stability and minimizing interference during online testing and classroom activities, including best practices for wireless network management such as conducting site surveys, designing for density, reducing interference from construction materials and other devices, and optimizing WiFi channels. ## Troubleshoot Pear Assessment Not Loading on District Network If you are experiencing slow performance while using Pear Assessment, a couple of IT factors may be causing this. Please consult your tech lead to perform a compatibility check to verify that the issues below have been considered. ## District Firewall Please add Pear Assessment and other required URLs in the safe list in your firewall software (iBoss, McAfee, etc.) * \*.pearassessment.com * \*.googleapis.com * \*.mathjax.org * \*.edgefonts.com * \*.edgefonts.net * \*s3.amazonaws.com * \*.peardeck.com * pearassessment.elasticbeanstalk.com Tip: Some URLs have a wildcard (\*). When you add URLs to the allow list, users must have the wildcard for them (e.g., Pear Assessment needs cdn.Pear Assessment.com, math.Pear Assessment.com, etc.) to work properly. Pear Assessment content is dynamically hosted in the cloud. No static IP addresses or ranges can be provided. ### Browser Extensions Some browser extensions are known to interfere with Pear Assessment app. Pear Assessment recommends removing unnecessary browser extensions from the browser. ### Internet Service Provider (ISP) Some schools and districts have an education-specific consortium providing internet access. In such cases, the ISP may have additional checks. Please your school or district unblock the above sites. ### Compatibility and Speed Test Please run the compatibility check [https://app.Pear](https://app.Pear) Assessment.com/compatibility and speed test at [https://app.Pear](https://app.Pear) Assessment.com/speedtest/ and let us know the results. ## Wireless Network Best Practices The increase in devices accessing school networks increases the need for stable WiFi networks, daily monitoring, and maintenance. To help network admins stabilize WiFi for online testing and classroom activities, the following best practices are recommended: ### Minimizing Impact * Users can take steps to minimize the network impact. Before testing: * Disable low-end wireless protocols that are not being used. * Turn off students’ mobile devices to avoid potential interference during testing. * Before the sign-in and preparation phase: * Ask classrooms to stagger sign-ins to minimize initial loading time. * For example, in a class of 30 students, the teacher can have 10 students sign in each minute, decreasing the strain on the network. ### Evaluating Site Readiness The following information helps users evaluate and improve their testing readiness. * Conduct a site survey * A site survey should include: * Evaluating the existing infrastructure. * Counting the number of user devices. * Examining the type of user traffic and interference. * Design for density * Install APs more densely to decrease the potential for overload with too many student devices. * Reduce WiFi interference from construction materials. * Construction materials in schools can impact WiFi coverage and speed. The following solid materials can slow WiFi speed or completely block wireless signals: * Brick, concrete, and meta * Filing bookshelves * Cabinets * If WiFi access points have adjustable antennas, point the antenna to aim the signal at the student devices to improve the throughput. * If possible, move the student devices directly under the AP. Even a couple of feet can make a big difference in throughput and signal strength. * Reduce interference from other WiFi networks. * When WiFi networks are set to use the same channel, they compete for limited bandwidth. Check for other WiFi names by opening the wireless options on your device for a list of WiFi networks. If users see many networks to choose from, they may encounter interference from these other networks. * Check your AP user guide to find out whether the APs can detect the least congested WiFi channel. * Reduce interference from other devices. * Electronic devices that are not connected to the school’s WiFi network, can still use the same 2.4GHz or 5GHz frequencies to connect. These can include: * Cordless phones * Bluetooth-enabled devices * Student mobile devices * Temporarily turn off or unplug electronics to reduce wireless interference during testing. * Personal devices communicate on the network, even while inside backpacks or bags. Email and social media notifications require the devices to send requests to maintain connectivity with the AP. * If a user previously had channel auto-switching allowed but noticed slow speeds or poor connections, manually configure the channel and perform speed tests to find the fastest channel. ## Contact Support If users are still having issues, please contact the Pear Assessment support team at support\@pear assessment.com. Here are the questions the support team will ask: 1. Have your IT team added Pear Assessment and all required URLs in the safe list? 2. What firewall software does your district use? 3. Who is the internet service provider, and do they have any extra security policies for school accounts? 4. Does your district have any extra security policies for student accounts? 5. Does your school or district do any additional HTTPS scanning? If yes, can your IT team unblock \*.pearassessment.com from additional HTTPS scans? 6. Does your IT team use any anti-virus software on the devices? If yes, can you add \*.pearassessment.com in the safe list? 7. What is the make and model of an affected device? 8. What is the name and version of the browser used to launch Pear Assessment? 9. Does your school or district use Pear Assessment in Kiosk mode? 10. Is the slowness encountered only when testing on the Kiosk mode? 11. Do users encounter slowness in incognito mode? 12. Are users experiencing slowness across the district or certain specific sites? 13. Can users run speed test and send us the results?