APP LITERATE: It’s the age-old question: can you tell if an edtech tool is making an impact? With early childhood literacy apps, the stakes are high. You’re only a baby for so long. Michael Levine and Lisa Guernsey, authors of “Tap, Click, Read,” have strong opinions on who needs to be involved in developing apps, why most apps fail miserably and the apps that do show real promise for helping the kiddos. Levine and Guernsey believe that experts must play a role in developing an app. They also have five recommendations for apps that won't totally fail your young readers.