Education Lab is a Seattle Times project that spotlights promising approaches to persistent challenges in public education. The Seattle Foundation serves as the fiscal sponsor for Education Lab, which is supported by grants from the Gates Foundation and Ballmer Group. Learn more about Ed Lab and subscribe to our weekly newsletter . A campaign-finance watchdog has filed a complaint against Let’s Go Washington, alleging the conservative political committee failed to properly disclose political advertising tied to two statewide initiative campaigns . The 24-page complaint , filed by Washingtonians for Ethical Government, alleges that Let’s Go Washington failed to report the financial value of more than 150 individual instances of promotional political advertising that the group identified by conservative podcaster and former TV journalist Brandi Kruse, as well as other in-kind, noncash contributions the organization allegedly received.…